diff --git a/subjects/abs.en.md b/subjects/abs.en.md
index 029eac22..59966501 100644
--- a/subjects/abs.en.md
+++ b/subjects/abs.en.md
@@ -19,6 +19,9 @@ You are not allowed to use `Math.abs`, make your own.
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Math.abs = undefined
 ```
diff --git a/subjects/all.en.md b/subjects/all.en.md
index a355b03a..2f280c0b 100644
--- a/subjects/all.en.md
+++ b/subjects/all.en.md
@@ -13,6 +13,9 @@ Create a function `all` that works like `Promise.all` but with objects.
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Promise.all = undefined
 ```
diff --git a/subjects/block-chain.en.md b/subjects/block-chain.en.md
index a5e5e392..ca63cadd 100644
--- a/subjects/block-chain.en.md
+++ b/subjects/block-chain.en.md
@@ -56,6 +56,8 @@ console.log(fork.index) //  -> 5
 
 ### Code provided
 
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 const hashCode = str =>
   (
diff --git a/subjects/change.en.md b/subjects/change.en.md
index 91801c5a..29025a97 100644
--- a/subjects/change.en.md
+++ b/subjects/change.en.md
@@ -20,6 +20,9 @@ Create 2 functions:
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 const sourceObject = {
   num: 42,
diff --git a/subjects/curry-entries.en.md b/subjects/curry-entries.en.md
index 829151e8..d3df0483 100644
--- a/subjects/curry-entries.en.md
+++ b/subjects/curry-entries.en.md
@@ -33,6 +33,9 @@ You will also have to create for each curry function the following:
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 // prettier-ignore
 const personnel = {
diff --git a/subjects/cut-corners.en.md b/subjects/cut-corners.en.md
index bea28c2d..4e69d35f 100644
--- a/subjects/cut-corners.en.md
+++ b/subjects/cut-corners.en.md
@@ -19,6 +19,9 @@ Some restrictions apply:
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Math.round = Math.ceil = Math.floor = Math.trunc = undefined
 ```
diff --git a/subjects/elementary.en.md b/subjects/elementary.en.md
index 83edc0df..158dde88 100644
--- a/subjects/elementary.en.md
+++ b/subjects/elementary.en.md
@@ -10,6 +10,9 @@ Create 3 functions:
 > functions should have (a, b) as arguments
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Math.imul = undefined
 ```
diff --git a/subjects/filter.en.md b/subjects/filter.en.md
index 515b2e7c..b88eb3be 100644
--- a/subjects/filter.en.md
+++ b/subjects/filter.en.md
@@ -20,6 +20,9 @@ and that works like the partition function from lodash.
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.filter = undefined
 ```
diff --git a/subjects/find-expression.en.md b/subjects/find-expression.en.md
index 1de4e304..6579a5ce 100644
--- a/subjects/find-expression.en.md
+++ b/subjects/find-expression.en.md
@@ -21,6 +21,9 @@ It will look something like this `1 *2 *2 +4`
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 const add4 = '+4'
 const mul2 = '*2'
diff --git a/subjects/flat.en.md b/subjects/flat.en.md
index 1fcc82b7..4b4a0bd4 100644
--- a/subjects/flat.en.md
+++ b/subjects/flat.en.md
@@ -11,6 +11,9 @@ Create the `flat` functions that works like the `.flat` array method
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.flat = undefined
 ```
diff --git a/subjects/for-each.en.md b/subjects/for-each.en.md
index 276660e6..7d32db5a 100644
--- a/subjects/for-each.en.md
+++ b/subjects/for-each.en.md
@@ -12,6 +12,9 @@ and that works like the method .forEach
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.forEach = undefined
 ```
diff --git a/subjects/gougle-search.en.md b/subjects/gougle-search.en.md
index aee8808f..fd9bc1fb 100644
--- a/subjects/gougle-search.en.md
+++ b/subjects/gougle-search.en.md
@@ -36,6 +36,9 @@ using a the server name as key.
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 // fake `getJSON` function
 let getJSON = async (url) => url
diff --git a/subjects/index-of.en.md b/subjects/index-of.en.md
index bbd5ebb6..955de540 100644
--- a/subjects/index-of.en.md
+++ b/subjects/index-of.en.md
@@ -22,6 +22,9 @@ Create 3 functions:
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.indexOf = undefined
 Array.prototype.lastIndexOf = undefined
diff --git a/subjects/is-winner.en.md b/subjects/is-winner.en.md
index b230e8d2..9f276007 100644
--- a/subjects/is-winner.en.md
+++ b/subjects/is-winner.en.md
@@ -24,6 +24,9 @@ displayed like : '1000, 1004, 1008'. The same goes for the results
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 const db = (() => {
   //countries that won the FIFA World Cup
diff --git a/subjects/is.en.md b/subjects/is.en.md
index fdb1a95e..abb46188 100644
--- a/subjects/is.en.md
+++ b/subjects/is.en.md
@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Add new function properties to the object `is`` to check a value type
+Add new function properties to the object `is` to check a value type
 - `is.num` value is a number
 - `is.nan` value is NaN
 - `is.str` value is a string
@@ -25,6 +25,9 @@ Add new function properties to the object `is`` to check a value type
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 const is = {}
 ```
diff --git a/subjects/manipulate-entries.en.md b/subjects/manipulate-entries.en.md
index 653df129..db01ba78 100644
--- a/subjects/manipulate-entries.en.md
+++ b/subjects/manipulate-entries.en.md
@@ -25,6 +25,9 @@ Create 3 other functions that use your previously create functions:
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 // small database with nutrition facts, per 100 grams
 // prettier-ignore
diff --git a/subjects/manipulate-keys.en.md b/subjects/manipulate-keys.en.md
index d93fe2ee..8c6fd192 100644
--- a/subjects/manipulate-keys.en.md
+++ b/subjects/manipulate-keys.en.md
@@ -20,6 +20,9 @@ Create 3 functions that works like the `.filter`, `.map` and `.reduce` array met
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 // small database with nutrition facts, per 100 grams
 // prettier-ignore
diff --git a/subjects/manipulate-values.en.md b/subjects/manipulate-values.en.md
index c3988e52..ffcb5e30 100644
--- a/subjects/manipulate-values.en.md
+++ b/subjects/manipulate-values.en.md
@@ -24,6 +24,9 @@ You will have a small database to help you with the groceries.
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 // small database with nutrition facts, per 100 grams
 // prettier-ignore
diff --git a/subjects/mapper.en.md b/subjects/mapper.en.md
index a92bf7a6..7e763fee 100644
--- a/subjects/mapper.en.md
+++ b/subjects/mapper.en.md
@@ -16,6 +16,9 @@ and that works like the method .flatMap
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.map = undefined
 Array.prototype.flatMap = undefined
diff --git a/subjects/min-max.en.md b/subjects/min-max.en.md
index dcc0d3fd..d64308b9 100644
--- a/subjects/min-max.en.md
+++ b/subjects/min-max.en.md
@@ -22,6 +22,9 @@ and returns the lowest
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Math.min = Math.max = undefined
 ```
diff --git a/subjects/mutability.en.md b/subjects/mutability.en.md
index 5b3d417f..50010cb1 100644
--- a/subjects/mutability.en.md
+++ b/subjects/mutability.en.md
@@ -1,29 +1,31 @@
-## Mutability
-
-### Instructions
-
-Create a copy of the person object called clone1.
-Create an other copy of the person object called clone2.
-
-Create a new variable `samePerson` with the same value as `person`.
-
-Increase by one the property age of `person`
-and set his contry to `'FR'`.
-
-
-### Notions
-
-- [nan-academy.github.io/js-training/examples/set.js](https://nan-academy.github.io/js-training/examples/set.js)
-- [nan-academy.github.io/js-training/examples/get.js](https://nan-academy.github.io/js-training/examples/get.js)
-- [nan-academy.github.io/js-training/examples/data-structures.js](https://nan-academy.github.io/js-training/examples/data-structures.js)
-
-
-### Code provided
-this code does not need to be sent for verification
-```js
-const person = {
-  name: 'Rick',
-  age: 77,
-  country: 'US',
-}
-```
+## Mutability
+
+### Instructions
+
+Create a copy of the person object called clone1.
+Create an other copy of the person object called clone2.
+
+Create a new variable `samePerson` with the same value as `person`.
+
+Increase by one the property age of `person`
+and set his contry to `'FR'`.
+
+
+### Notions
+
+- [nan-academy.github.io/js-training/examples/set.js](https://nan-academy.github.io/js-training/examples/set.js)
+- [nan-academy.github.io/js-training/examples/get.js](https://nan-academy.github.io/js-training/examples/get.js)
+- [nan-academy.github.io/js-training/examples/data-structures.js](https://nan-academy.github.io/js-training/examples/data-structures.js)
+
+
+### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
+```js
+const person = {
+  name: 'Rick',
+  age: 77,
+  country: 'US',
+}
+```
diff --git a/subjects/nasa.en.md b/subjects/nasa.en.md
index d7215d4d..b6782a22 100644
--- a/subjects/nasa.en.md
+++ b/subjects/nasa.en.md
@@ -2,13 +2,10 @@
 
 ### Instructions
 
-Create a `nasa` function that takes a number as parameter and returns all 
-numbers from 1 to the number passed as parameter, with three exception.
-
+Create a `nasa` function that takes a number `N` as a parameter and returns 
+a string with all numbers from 1 to the `N` separated by whitespace, with three exceptions:
 - For numbers divisible by 3, add 'NA'.
-
 - For numbers divisible by 5, add 'SA'.
-
 - For the number that are divisible by 3 and 5 add 'NASA'.
 
 
diff --git a/subjects/pyramid.en.md b/subjects/pyramid.en.md
index 2c429583..31bf63d2 100644
--- a/subjects/pyramid.en.md
+++ b/subjects/pyramid.en.md
@@ -10,14 +10,16 @@ Just like triangle
 
 ### Output example
 
-- '*' character and depth of 5 :
+- `*` character and depth of 5 :
 
+```
     *
    ***
   *****
  *******
 *********
-
+```
+> No new line in last line
 
 ### Notions
 
diff --git a/subjects/quantifiers.en.md b/subjects/quantifiers.en.md
index 0515ca4e..ef676d7a 100644
--- a/subjects/quantifiers.en.md
+++ b/subjects/quantifiers.en.md
@@ -21,6 +21,9 @@ The use of `[].every` and `[].some` is forbidden for this exercise.
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.some = Array.prototype.every = undefined
 ```
diff --git a/subjects/race.en.md b/subjects/race.en.md
index 2f8f842f..a87e619b 100644
--- a/subjects/race.en.md
+++ b/subjects/race.en.md
@@ -16,6 +16,9 @@ and a number and return the first resolved values up to the number given.
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Promise.race = undefined
 ```
diff --git a/subjects/reduce.en.md b/subjects/reduce.en.md
index 720b26d2..ce42a1a0 100644
--- a/subjects/reduce.en.md
+++ b/subjects/reduce.en.md
@@ -35,6 +35,9 @@ The use of `[].reduce` and `[].reduceRight` is forbidden for this exercise.
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.reduce = undefined
 Array.prototype.reduceRight = undefined
diff --git a/subjects/repeat.en.md b/subjects/repeat.en.md
index 6de97f99..45740c19 100644
--- a/subjects/repeat.en.md
+++ b/subjects/repeat.en.md
@@ -16,6 +16,9 @@ Of course you may not use the method directly
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 String.prototype.repeat = undefined
 ```
diff --git a/subjects/reverser.en.md b/subjects/reverser.en.md
index 6cff5953..e817017f 100644
--- a/subjects/reverser.en.md
+++ b/subjects/reverser.en.md
@@ -13,6 +13,9 @@ Like `[].reverse()` but working also for strings (without using the actual metho
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.reverse = undefined
 ```
diff --git a/subjects/sign.en.md b/subjects/sign.en.md
index 2c9b752c..3eff66a5 100644
--- a/subjects/sign.en.md
+++ b/subjects/sign.en.md
@@ -19,6 +19,9 @@ if they both have the same sign
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Math.sign = undefined
 ```
diff --git a/subjects/slicer.en.md b/subjects/slicer.en.md
index f0bf798c..ff3d2a96 100644
--- a/subjects/slicer.en.md
+++ b/subjects/slicer.en.md
@@ -13,6 +13,9 @@ It takes an additional first argument which is the string or the array
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 Array.prototype.slice = undefined
 String.prototype.slice = undefined
diff --git a/subjects/triangle.en.md b/subjects/triangle.en.md
index 250cdc79..1d8c4a1d 100644
--- a/subjects/triangle.en.md
+++ b/subjects/triangle.en.md
@@ -8,14 +8,16 @@ of the number passed as argument.
 
 ### Output example
 
-- '*' character and depth of 5 :
+- `*` character and depth of 5:
 
+```
 *
 **
 ***
 ****
 *****
-
+```
+> No new line in last line
 
 ### Notions
 
diff --git a/subjects/unbreakable.en.md b/subjects/unbreakable.en.md
index 268bfdf0..9a5e05ed 100644
--- a/subjects/unbreakable.en.md
+++ b/subjects/unbreakable.en.md
@@ -17,6 +17,9 @@ Implement 2 functions:
 
 
 ### Code provided
+
+> all code provided will be added to your solution and doesn't need to be submited.
+
 ```js
 String.prototype.split = undefined
 String.prototype.match = undefined