(x+3)^3-(2-x)^3= ?
(2x-1)^3-(2-3x)^3=?
x^3+9x^2+27x+27-(8-12x+6x^2-x^3)=x^3 +9x^2+27x+27-8+12x-6x^2+x^3= 2x^3+3x^2+39x+19
8x^3-12x^2+6x-1-(8-36x+54x^2-27x^3)=8x^3-12x^2+6x-1-8+36x-54x^2+27x^3= 35x^3 -66x^2+45x-9
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x^3+9x^2+27x+27-(8-12x+6x^2-x^3)=x^3 +9x^2+27x+27-8+12x-6x^2+x^3= 2x^3+3x^2+39x+19
8x^3-12x^2+6x-1-(8-36x+54x^2-27x^3)=8x^3-12x^2+6x-1-8+36x-54x^2+27x^3= 35x^3 -66x^2+45x-9
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