$\int\frac{x^2+2x-1}{x^3+3x^2+2x}dx$
$\left(9x-1\right)\left(9x-1\right)$
$m^2-m^2n+27m-27mn$
$\left(2t^2-t-4\right)$
$16x^2-32x+4$
$\left(9x^2+y-1\right)dx=\left(4y-x\right)dy$
$-2\left(+x^3-3x^2-144x+440\right)$
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