$\left(\frac{9}{4}x+6\right)-\left(-\frac{5}{4}x-24\right)$
$\frac{1-\cot\left(x\right)}{\tan\left(x\right)-1}$
$x^2y-2y=0$
$6p^2-11p-10$
$6x^2-116x+412=3x^2-68x-220$
$\left(-33\right).\left(+21\right)$
$\frac{\left(7x-8\right)}{5x+3}=x$
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