$\left(x+1\right)\left(x^5+3x^4-7x^3+2x^2-8x+1\right)$
$\csc^2a-\cos^2a\cot^2a$
$\cos\:2\left(\theta\:\right)-2\cos\:\left(\theta\:\right)=-1;0^{\circ\:}\le\:\theta\:<\:180^{\circ\:}$
$\left(-9+3\right)-\left(7-2\right)$
$xdy+\sqrt{y}\cdot dx=0$
$\sqrt{36z^{16}}$
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