$6x-4=-10$
$7=7$
$\tan^{-1}\left(\frac{800}{700}\right)$
$y^5-625y$
$5\cos\left(x\right)\cos\left(3x\right)$
$4x+5x+6x$
$\frac{4x^{3}+2x^{2}}{2x^{2}}$
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