$\cos^225-\sin^225$
$\int\frac{x^2+2x-6}{\left(x+3\right)^3}dx$
$5+x>-11$
$\frac{dy}{dx}=-3y=2e^{3t}$
$\left(-2\right)^1$
$\cot^2\left(a\right)\sec^2\left(a\right)=\csc^2\left(a\right)$
$\lim_{x\to1}\left(\frac{x^2+2x+3}{x^2-1}\right)$
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