Раскройте скобки , если a и b — целые числа . а)+(а+b)=... б)-(a+b)=... в)+(а-b)=... г)-(a-b)=... д)+(-a+b)=... е)-(-a+b)=... ж)+(-a-b)=... з)-(-a-b)=... Срочно !!!!!
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