1) -3x. (2x-1);

2) (2a - b) 8b+8b²;

3) 0,5a(2a - b) - 0,56(2b - a);

4) (x-2)(x+3);

5) (2x-1)(31-x);

6) 4y-(1+2y)(2y-y)
срочно даю 100 Балів ​
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