Помогите пожалуйста:
1. а) x²y+xyx+2;
б)8х•3у²•(-5у)-7х²•4у;
в)5а•2а•(-а)-а³ba².
2. a)8b³-3b³+17b-3b³-8b-5;
б)3p²+5pc-7c²+12p²-6pc;
в)3a²-5a²-11a-3a²+5a+11.
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