$\sec^2x-2\tan x$
$\frac{x^5-35}{x-2}$
$\frac{\left(x^2-x-2\right)}{x^2-1}$
$-3x^2y+y$
$\int7zln3zdz$
$\left(-3\right)\left(2\right)\left(3\right)\left(-4\right)$
$x^2+13x-14$
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