$\left(\frac{x-1}{x^2+1}\right)^2$
$y'=2\frac{y}{x}+4\frac{x}{y}$
$\left(x^3\right)^{\frac{3}{2}}$
$cosh\left(x^2-x\right)$
$3m^3-20+12m^2-5m$
$m^2+2mn+n\:^2$
$\int\:3x\left(7x^2-1\right)^9dx$
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