$3sec^2x\:-\:2tan^{2\:}x\:-\:4\:=\:0\:$
$ghgj$
$\lim_{y\to\infty}\left(\frac{1}{y-\sqrt{2-y^2}}\right)$
$10\log\left(75\right)$
$32\:=\:-3k\:+\:5$
$\lim_{x\to0}\left(\frac{xe^x}{1-x}\right)$
$\int\left(x\left(x^2-9\right)^{\frac{3}{2}}\right)dx$
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