$x^2\:+\:3x\:=\:24$
$3x-6\left(x+2\right)$
$xy'-2y=3x^2+2x$
$\left(5m^2+6m^3\right)^2$
$\frac{7-7cos^2x}{sin^2x}$
$\lim_{x\to-3}\left(4x^2+12x\right)$
$cosec^2a\:cos^2a=cosec^2a-1$
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