$\frac{d}{dx}\frac{\sin^2\sqrt{8x}}{\cos^2\sqrt{8x}}$
$32-5\cdot2$
$x^2-8x\le0$
$2x^2-7x=-6$
$7<5-x$
$a^{2}-41\quad\left(a^{2}+6\right)$
$y\log\left(y\right)dx+xdy=0$
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