$\int9x\left(x^2+7\right)^{-2}dx$
$\int\frac{1}{\left(z-1\right)^3}dz$
$x^2+34+289$
$y=\frac{4x^{2}-16}{x-2}$
$\left(2t+r\right)^4$
$5n=60$
$x^2-35x-75=0$
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