$5-\left(-3\right)+7\left(-9\right)-14$
$\frac{7}{4}\:-\:\frac{3}{4}\:=\:$
$\int_2^{\infty}\left(\frac{3}{x\ln\left(x\right)}\right)dx$
$\int\frac{x-1}{\left(x^2+5x+4\right)}dx$
$-x^{-2}dx=ydy$
$x^3-14x^2-49x$
$2\left(3n+7\right)+4n$
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