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2 -y3+5/3a2x2
3 -3/2a2+5/2b2+3ab3
4 x2-4x+1
5 2x5-5x3-5/2x
6 -3m2+4mn-10n2
7 2a6b5-a4b3-1/3
8 -1/5x3+x2+2x-3