$\lim_{x\to0}\left(\frac{e^{\frac{1}{x}}}{x^{-3}}\right)$
$\left(4m\right)\left(-9am\right)\left(a^2m^2\right)$
$\int\frac{x^{3}+2x^{2}+5x+12}{x+2}dx$
$sen\left(x\right)+cos^2\left(x\right)\cdot tan\left(x\right)-1$
$xy=28$
$72y+43y+24u+32y+21u+12u$
$\int\:\frac{1}{\sqrt{16-4x^2}}dx$
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