$\left(x^2\:-\:2x\:\right)^2$
$\lim_{x\to0}\left(\frac{e^{-x}-1}{x}\right)$
$\left(2x^2y-y^3\right)^3$
$\ln\left(n^2+12\right)=\ln\left(-9n-2\right)$
$\int\frac{2s+5}{s^2+6s+34}dx$
$6x\:sen\:2x^2\:-\:9\:\:\:\:\:\:\:\:\:\:\:\:\:$
$x2\:+5x\:+8\:x\:+3$
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