$\lim_{x\to\infty}\left(\frac{lnx}{cosx}\right)$
$\frac{\:dy}{dx}\:\left(x^{2\:}+\:xy\right)=xy\:-\:x^{2\:}$
$\int5e^{5x-7}dx$
$\left(-3-8\right)+\left(-5-2\right)-\left(-9+1\right)-\left(7-5\right)$
$\log_{x+2}\left(9x\right)+2$
$\frac{\left(coseca-cota\right)^2+1}{seca\left(coseca-cota\right)}=\:2cota$
$\int_1^b\left(\frac{1}{x^{0.99}}\right)dx$
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