$-220+15$
$\int\left(\frac{1-e^{-x^2}}{x^2}\right)dx$
$\int\frac{16}{x^2-4}dx$
$\left(1+8x\right)\:\left(1-8x\right)$
$1+3x+x+2$
$x+5\left(2x-3\right)=3\left(x-1\right)+4$
$\frac{d^2}{dx^2}\left(y=\frac{6}{\left(x-1\right)^2}\right)$
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