$\int_{10}^{20}\left(2t-3\right)dx$
$\csc2x^2-\cot\left(2x\right)=1$
$\frac{dv}{dt}=3t+2t^2$
$\int\frac{x-2}{x^2-4x+7}dx$
$\lim_{x\to0}\left(\frac{e^x-\cos\left(x\right)}{x}\right)$
$-4157\:+360$
$\int\:\frac{1}{\left(1+sen2x\right)^2}\:dx$
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