$1+5\cdot\left(4\cdot7+5\cdot\left(15-4\cdot5\right)\right)-3\cdot\left(7-4\right)$
$\csc^2m+\frac{1}{\tan^2m}$
$\left(1+\frac{2}{x}\right)^{-0.5}$
$5x^2+14x-3$
$\int\frac{\sqrt{\left(x-2\right)^2-4}}{x-2}dx$
$13x\:-\:2\left(3x+6\right)$
$\left(a+b\right)\left(a-x\right)$
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