$\left(\sec\left(u\right)-\tan\left(u\right)\right)$
$7+3m=28$
$\left(-25\right)-\left(-45\right)+\left(-60\right)+\left(+10\right)$
$y''\:-\:6y'\:+\:25y\:=\:0$
$\left(2a+3b-4c\right)\left(2a-3b-4c\right)$
$\int\left(x^3y\right)dx$
$4\sqrt{x}+2-\frac{3}{x}$
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