$\cos x-\cos^2x=\cos x\sin^2x$
$\int_1^{\infty}\left(2e^{3x}\right)dx$
$\int\frac{3x^2-1}{x}dx$
$\int\frac{x^2}{\sqrt{x^3+5}}dx$
$\left(81w\right)^{-\frac{3}{4}}$
$\lim_{x\to3}\:2x^2+6x-3$
$\int3x^26^{4x}dx$
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