README-en.md edited online with Bitbucket

README-en.md

 1. Reviewed the following concepts:
 
     a. Implementing arithmetic expressions in C++.
+    
     b. Basic data types in C++ (int, float, double)
+    
     c. Using "type casting" to cast the value of variables to other data types within expressions.
+    
     d. Using arithmetic functions and constants from the `cmath` library.
+    
     e. Quadratic equations and their graphs.
 
 2. Studied the concepts and instructions for the laboratory session.