Theory
Exercises
1. 
Add the given expression
Difficulty: easy 
2

2. 
Add the given expression
Difficulty: easy 
3

3. 
Subtract the algebraic expression
Difficulty: medium 
4

4. 
Solve the algebraic expression
Difficulty: medium 
3

5. 
Find the sum of the following expressions
Difficulty: medium 
4

6. 
Solve the expression
Difficulty: hard 
5

7. 
Add the given expression
Difficulty: hard 
5

8. 
Reduce the expressions
Difficulty: hard 
6

Tests
1. 
Training test
Difficulty: medium 
7
