$x^2-80x-650$
$\frac{2cot\left(x\right)}{2-cosec^2\left(x\right)}=-\tan2\left(x\right)$
$\lim_{x\to\frac{\pi}{2}}\left(\frac{1-sin\:9x}{\frac{\pi}{2}-x}\right)$
$\sqrt{\left(\frac{a^5}{b^3}\right)^{-1}}$
$\left(v-8\right)\left(v+10\right)$
$\frac{1}{csc\theta\:-1}-\frac{1}{csc\theta\:+1}=2tan^2\theta\:$
$( 4 + 5 m ) ^ { 3 }$
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