14xy+21y2 = 14y(x+3)
3y3 - 6y6 = 9y(1-4) = -27y
x(y-5)-6(y-5) = (y-5)(x-6)
a(3-b)-2(b-3) = (3-b)(a+2)
14xy+21y2 = 14y(x+3)
3y3 - 6y6 = 9y(1-4) = -27y
x(y-5)-6(y-5) = (y-5)(x-6)
a(3-b)-2(b-3) = (3-b)(a+2)