$4-1-\left(4-3\right)$
$cscx\left(1-cos2x\right)$
$\frac{dy}{dx}+2ycot2x\:=cos2x$
$\int\frac{3x^2-5x}{x^3+2x^2-15x}dx$
$2w-3x+9=6w-2x-10$
$1.5-\left(-3.7\right)$
$\int\ln\left(v\right)\cos\left(2v\right)dv$
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