$\lim_{x\to\infty}\left(e^{-x}\right)dx$
$\cot^2x+\csc^2x=4$
$3\int\frac{\cos\:\left(\sqrt{x}\right)}{\sqrt{x}}dx$
$4z^2-6z+3$
$\int2e^3dx$
$\lim_{x\to0}\left(tan\left(8x\right)\right)^x$
$-81+9a^{10}$
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