$csc^2\left(x\right)cos\left(2x\right)$
$\left(-2+5\right)\left(-2-1+2\right)+10$
$\int\left(\frac{e^{7\sqrt{t}}}{\sqrt{t}}\right)dt$
$2\sin^2a=2-2\cos^2a$
$\frac{d^4}{dx^4}\left(\frac{1}{1+3x}\right)$
$\int\left(\frac{3}{\left(2x-1\right)^2}\right)dx$
$6\sec^2x+12\tan x=14$
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