$\frac{d^2}{dx^2}\left(4\cdot cot\left(\frac{x}{10}\right)\right)$
$\sin^4-\cos^4=1-2\sin^2$
$\left(30^8\right)^7$
$3x-\frac{1}{2}>6$
$11m\:+\:7\:+\:2m$
$5=\frac{a}{7}$
$6\:-\:n\:-\:11$
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