2(а+1)(а+4)+(а-6)(а²+6а+36)=2(а^2+5а+4)+
+а^3-216=а^3+2а^2+10а-208
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2(а+1)(а+4)+(а-6)(а²+6а+36)=2(а^2+5а+4)+
+а^3-216=а^3+2а^2+10а-208