$\left(8x+50\right)\left(8x-10\right)$
$z^2-12z+20$
$\lim_{x\to\frac{\pi}{4}}\left(\frac{tanx-cotx}{4x+\pi}\right)$
$\int_{\frac{\pi}{4}}^{\frac{\pi}{3}}\frac{cos\:x\:+\:sen\:x}{sen\:2x}dx$
$\left(12x^3+3x^2-7x\right)+\left(x^3-8x^2+3x\right)$
$csc\:x\left(\frac{1}{cos\:x}-cos\:x\right)$
$\left(x+1\right)-12\left(x+1\right)+32$
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