раскройте скобки:
1) 2(а+3b-7c);
2) 0,4(1,3x-0,5y-1,3);
3) (a-4d+3p)*(-0,8);
4) -0,4a(-4b+3p-1,1c);
5) -m(-k+29n-38,9);
6) (0,1+0,3x-2y)*(-10a).
помогите пожалуйста
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