$\int\cos\left(7\right)ydy$
$\int\frac{\left(\sqrt{11-x^2}\right)}{9x^2}dx$
$-100\:+\:600$
$\lim_{x\to0}\left(\frac{e^x-\left(1+x\right)}{x^n}\right)$
$\tan^2x\cdot\cos x\cdot\csc^2x=\sec x$
$\sqrt[4]{\frac{1}{81}b^8}$
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