$m-\left(-8\right)=-12$
$\left(+8\right)+\left(-13\right)-\left(-12\right)+\left(-17\right)-\left(-3\right)$
$dy-xdx+2xydx=0$
$\frac{3-2x}{-4}>5-x$
$\int\:\frac{x-1}{\left(x+2\right)\left(x-a\right)}dx$
$2\sec\left(x\right)^2-2\cot\left(x\right)^2$
$\sin2x=5\sin x$
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