(а-а)*b и 0;
(x+y) × 0 и x+y;
5,1х × 7 и 35,7 х;
а-b и b-a;
x-y и (y -x)(-1)
7(a-b) и 7a-7b
помагите! \- это дробь
-2,3х*4;
9у*(-3)
5,2 х*(-2)
2\3у*6
-4,1х*(-5)
-3\5y*15
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