1. x-(x -y)

2. a - (b + a)

3. (m - n ) + n

4. (x + y) - y

5. 5– (3 + x)

6. – x + (x + 2,7)

7. – (– в + 3,8) + 0,7

8. 4,74 – ( 2а + 3,7) ( помогите пожалуйста срочно нужно сделать) :))​
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