8x^3y^3-1/125 4a^2+b^2+c^2-4ab+4ac-2bc 5X^2-15x+2xy-6y a^2(x+y)^3-a^2b^3还有几个 7(a+b)^2-5(a+b)-26x^2-7x-3x^3+2x^2+2x+12X^2-3x-1x^2+4x-1
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