1.

Simplify:(1) m2-n2m+n2×m2+mn+n2m3-n3(2) a2+10a+21a2+6a-7×a2-1a+3(3) 8x3-27y34x2-9y2(4) x2-5x-24x+3x+8×x2-64x-82(5) 3x2-x-2x2-7x+12÷3x2-7x-6x2-4(6) 4x2-11x+616x2-9(7) a3-275a2-16a+3÷a2+3a+925a2-1(8) 1-2x+x21-x3×1+x+x21+x

Answer» Simplify:

(1) m2-n2m+n2×m2+mn+n2m3-n3



(2) a2+10a+21a2+6a-7×a2-1a+3



(3) 8x3-27y34x2-9y2



(4) x2-5x-24x+3x+8×x2-64x-82



(5) 3x2-x-2x2-7x+12÷3x2-7x-6x2-4



(6) 4x2-11x+616x2-9



(7) a3-275a2-16a+3÷a2+3a+925a2-1



(8) 1-2x+x21-x3×1+x+x21+x


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