1)=2с2*(4с-1)+4с-1=(4с-1)(2с2+1)
3)=9ав2*в-3а2+3в2-в=9ав3-3а2+3в2-в
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1)=2с2*(4с-1)+4с-1=(4с-1)(2с2+1)
3)=9ав2*в-3а2+3в2-в=9ав3-3а2+3в2-в