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\frac{\left(x+1\right)^{2}\left(x^{2}-x+1\right)\times 3x\times 2\left(1-x\right)}{\left(x-1\right)\left(x+1\right)\left(x+1\right)}
Multiply x+1 and x+1 to get \left(x+1\right)^{2}.
\frac{\left(x+1\right)^{2}\left(x^{2}-x+1\right)\times 3x\times 2\left(1-x\right)}{\left(x-1\right)\left(x+1\right)^{2}}
Multiply x+1 and x+1 to get \left(x+1\right)^{2}.
\frac{-2\times 3x\left(x-1\right)\left(x+1\right)^{2}\left(x^{2}-x+1\right)}{\left(x-1\right)\left(x+1\right)^{2}}
Extract the negative sign in 1-x.
-2\times 3x\left(x^{2}-x+1\right)
Cancel out \left(x-1\right)\left(x+1\right)^{2} in both numerator and denominator.
-6x\left(x^{2}-x+1\right)
Multiply -2 and 3 to get -6.
-6x^{3}+6x^{2}-6x
Use the distributive property to multiply -6x by x^{2}-x+1.
\frac{\left(x+1\right)^{2}\left(x^{2}-x+1\right)\times 3x\times 2\left(1-x\right)}{\left(x-1\right)\left(x+1\right)\left(x+1\right)}
Multiply x+1 and x+1 to get \left(x+1\right)^{2}.
\frac{\left(x+1\right)^{2}\left(x^{2}-x+1\right)\times 3x\times 2\left(1-x\right)}{\left(x-1\right)\left(x+1\right)^{2}}
Multiply x+1 and x+1 to get \left(x+1\right)^{2}.
\frac{-2\times 3x\left(x-1\right)\left(x+1\right)^{2}\left(x^{2}-x+1\right)}{\left(x-1\right)\left(x+1\right)^{2}}
Extract the negative sign in 1-x.
-2\times 3x\left(x^{2}-x+1\right)
Cancel out \left(x-1\right)\left(x+1\right)^{2} in both numerator and denominator.
-6x\left(x^{2}-x+1\right)
Multiply -2 and 3 to get -6.
-6x^{3}+6x^{2}-6x
Use the distributive property to multiply -6x by x^{2}-x+1.