Раскройте скобки и приведите подобные члены: 1) (4a-3b-2с)-(-a+b—3c)+(4a-2b+c);
2) (-6x-3y+5)+(-2x+4y-1)-(7x-2y-6).
3) 3(2a-3b) 4(3a+5b)-2(b-4,5a);
4) -4(2x-3y)-4(4x-y)+5,5(2x-y) срочно пжж​
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