Example

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

Question

$$\frac{y^{2}+y+1}{y+1}\times\frac{y-1}{y+1}\times\frac{y^{2}-1}{y^{3}-1}$$

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