$4x+2x=60$
$150+75-58-28$
$\frac{1}{3x+9}$
$\int3ay^2dx$
$\lim_{x\to0}\left(\frac{x-senx}{cosx+x^2-1}\right)$
$\int\left(\tan\left(2x\right)^4\right)dx$
$\lim\:_{x\to\:+\infty\:\:}\left(\frac{x+in\left(6\right)}{x-in\left(6\right)}\right)^x$
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