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\frac{\left(2y^{2}-11y-21\right)\left(y^{2}-9y+8\right)}{\left(y-1\right)\left(y-7\right)}
Multiply \frac{2y^{2}-11y-21}{y-1} times \frac{y^{2}-9y+8}{y-7} by multiplying numerator times numerator and denominator times denominator.
\frac{\left(y-8\right)\left(y-7\right)\left(y-1\right)\left(2y+3\right)}{\left(y-7\right)\left(y-1\right)}
Factor the expressions that are not already factored.
\left(y-8\right)\left(2y+3\right)
Cancel out \left(y-7\right)\left(y-1\right) in both numerator and denominator.
2y^{2}-13y-24
Expand the expression.
\frac{\left(2y^{2}-11y-21\right)\left(y^{2}-9y+8\right)}{\left(y-1\right)\left(y-7\right)}
Multiply \frac{2y^{2}-11y-21}{y-1} times \frac{y^{2}-9y+8}{y-7} by multiplying numerator times numerator and denominator times denominator.
\frac{\left(y-8\right)\left(y-7\right)\left(y-1\right)\left(2y+3\right)}{\left(y-7\right)\left(y-1\right)}
Factor the expressions that are not already factored.
\left(y-8\right)\left(2y+3\right)
Cancel out \left(y-7\right)\left(y-1\right) in both numerator and denominator.
2y^{2}-13y-24
Expand the expression.