$\int\frac{5x+7}{\left(x-1\right)\left(x+4\right)}dx$
$\int_1^{\infty}\left(\frac{x+2}{x^2+4x}\right)dx$
$\int\frac{3x^2+1}{x^3+x+5}dx$
$\lim_{x\to0}\frac{x^2-\:x}{\sqrt{x+4}\:-\:2\:}$
$2\tan-\sec^2$
$-73-\left(-56\right)$
$0^2+2\cdot0\cdot3+3^2$
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