$\int\frac{1}{\sin\left(x\right)\tan\left(x\right)}dx$
$\left(7x^4+5x^5+4x^2-7\right)+\left(x^3-3x^2-5+x\right)$
$z^2-12z+20$
$\:64\::\:8\:+\:4\:$
$f\left(x\right)=12x^2+6x$
$\lim_{x\to3}\left(\frac{x^3+2x^2-5x-6}{x^2-x-6}\right)$
$\frac{dy}{dx}=3x^2cos^2y$
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