2a²+2ab                3a³-3a²b               x²+x=xy+y

X³-xy+2x²-2y     m²+2mn+n²        p²-2pq+q²

125

Ax+a+x+1           x²+3x+2                      y²+5y+6

a+b²                    1-x²                        a²+5a-6

x²-y²                      1-x²                       2a²+5ab+2b²

9x²+75x+46

126

24n²+48mn                        36a²+63ab+5b²

4x²-9y²                                 25mn-25m²-6n²

-2a²+ab+3b²                      35x²-29xy-28y²

(A²+b²)²                               m²n³-mn³-m³+m²

2x²y²+4x⁵-y⁴-2x³y²               3x²y³+a  ³xy²+9a²xy+3a⁵

128

-a²-2ab-b2²                         -x²+y²

-x²+2xy-y²                 -5mn+6m²+n²

-11ab-10a²+6b²                                161xy+21x²-56y²