$\lim_{x\to-2}\left(\frac{x^2-4}{x}\right)$
$.000213.\frac{3600}{1}$
$\left(7m\:-\:5n\right)\left(-\:5n\:-\:7m\right)$
$\frac{-4+9\cdot2}{7\cdot2}$
$\int\frac{2.41}{x\left(x+2\right)}dx$
$\int_1^2\left(\frac{1}{xln\left(x\right)^2}\right)dx$
$81x^2+9$
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