Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$6(x+1)^{2}+2(x-1)(x^{2}+x+1)-2(x+1)^{3}=32;$$

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