$\int\frac{2x-2}{x^3+x^2-5x+3}dx$
$x-15=-34$
$-3+2\cdot4$
$\int_0^{\infty}\left(\frac{1}{b^2+x^2}\right)dx$
$\lim_{x\to\:-3}\frac{-5}{\left(x+3\right)^2}\:$
$-5+6\cdot2$
$8\left(a+b\right)$
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