$n^2+14n-32$
$25a^4+25b^4+50a^2\:b^2$
$\lim_{x\to-2}\left(\frac{x^2+4x+4}{2x^3+3x^2-2x}\right)$
$\left(x+3\right)^2\:2\left(3y-5\right)^2$
$\left(3\right)\left(-23\right)$
$\int\frac{sen\left(\frac{1}{x}\right)}{x^2}dx$
$e^x\frac{dy}{dx}+5e^xy=4$
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