Даю 25 баллов.Упростите выражение. 1)6a+8a,
2)28c-15c,
3)13y-2y,
4) m+29m,
5)98p-p,
6)17k+k,
7)4x+13x+15x,
8)67z-18z+37,
9)35x+x-6.

Раскройте скобки:
1)2(a+b),
2)(c-9)*11,
3)14(4a-3).
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