$\int2\sec^26xdx$
$-987-\left(+769\right)$
$\left(1+\cos\left(b\right)\right)\left(1-\cos\left(b\right)\right)$
$\left(\frac{dy}{dx}\right)^2=tan^3x$
$\frac{dy}{dx}\left(x^3\:+\:y^3\:=\:3xy\:\right)$
$-5=-\sec\left(x\right)^2-6-2\sec\left(x\right)$
$5.\left(2^x\right)=3-2^{x+2}$
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