$4x=2\left(66-x\right)-12$
$\ln\left(\sqrt{1+2x}\right)$
$\frac{d}{dx}\left(x^{-2\sqrt{x}}\right)$
$-1.-1.-1-6$
$9x^2-6x+1=7$
$\int\frac{1}{x+2\left(x^2+1\right)}dx$
$\frac{\left(3a^4\:b^2\:c^3\right)^2}{\left(3a^-2\:b^5\:c\right)\:^3}$
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