$\lim_{x\to0}\left(2xcsc\left(2\pi-x\right)\right)$
$\frac{6a^2b^3}{3ab}$
$9x^{10}-6x^5+1$
$\frac{x^3-4x^2+x\:+6}{x^2+1}$
$121y^2+22yz+z^2$
$\int_0^{\infty}\left(\frac{1}{x+3}\right)dx$
$8x-56=0$
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