$\frac{2x-3}{\left(x-3\right)\left(x-4\right)}$
$-7+7\left(-1-3n\right)$
$f\left(x\right)=\frac{9}{\left(x-4\right)\left(9-x\right)}$
$\int\frac{x^{10}-1}{x^5}dx$
$\left(4mn+5ny\right)^3$
$-y=-7$
$x^2-22x+122$
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