diff --git a/1-js/01-getting-started/1-intro/article.md b/1-js/01-getting-started/1-intro/article.md
index e9d5435a..19be4ec3 100644
--- a/1-js/01-getting-started/1-intro/article.md
+++ b/1-js/01-getting-started/1-intro/article.md
@@ -92,10 +92,7 @@ JavaScript is the only browser technology that combines these three things.
 
 That's what makes JavaScript unique. That's why it's the most widespread tool for creating browser interfaces.
 
-Moreover, frameworks like react native and ionic lets us develop mobile applications using JavaScript.
-
-While planning to learn a new technology, it's beneficial to check its perspectives. So let's move on to the modern trends affecting it,  including new languages and browser abilities.
-
+That said, JavaScript also allows to create servers, mobile applications, etc.
 
 ## Languages "over" JavaScript
 
diff --git a/9-regular-expressions/14-regexp-lookahead-lookbehind/1-find-non-negative-integers/solution.md b/9-regular-expressions/14-regexp-lookahead-lookbehind/1-find-non-negative-integers/solution.md
index 3b5ceda1..aa62aca1 100644
--- a/9-regular-expressions/14-regexp-lookahead-lookbehind/1-find-non-negative-integers/solution.md
+++ b/9-regular-expressions/14-regexp-lookahead-lookbehind/1-find-non-negative-integers/solution.md
@@ -1,9 +1,9 @@
 
-A number is `pattern:\d+`.
+The regexp for an integer number is `pattern:\d+`.
 
 We can exclude negatives by prepending it with the negative lookahead: `pattern:(?<!-)\d+`.
 
-If we try it now, we may notice one more "extra" result:
+Although, if we try it now, we may notice one more "extra" result:
 
 ```js run
 let reg = /(?<!-)\d+/g;
@@ -13,11 +13,11 @@ let str = "0 12 -5 123 -18";
 console.log( str.match(reg) ); // 0, 12, 123, *!*8*/!*
 ```
 
-It matches `match:8` of `subject:-18`. To exclude it, we need to ensure that the regexp starts matching a number not from the middle of another number.
+As you can see, it matches `match:8`, from `subject:-18`. To exclude it, we need to ensure that the regexp starts matching a number not from the middle of another (non-matching) number.
 
-We can do it by specifying another negative lookbehind: `pattern:(?<!-)(?<!\d)\d+`. Now `pattern:(?<!\d)` ensures that a match does not start after another digit.
+We can do it by specifying another negative lookbehind: `pattern:(?<!-)(?<!\d)\d+`. Now `pattern:(?<!\d)` ensures that a match does not start after another digit, just what we need.
 
-Or we can use a single lookbehind here:
+We can also join them into a single lookbehind here:
 
 ```js run
 let reg = /(?<![-\d])\d+/g;