$\lim_{x\to\infty}\left(\frac{4e^x+1}{3x^2-7}\right)$
$16-25y^2$
$\int\:\:\frac{46}{e^{-x}+1}dx$
$9+5m-4$
$\lim_{x\to0}\left(\frac{e^{7x}-1-7x}{\sin\left(x\right)}\right)$
$\frac{n^2}{n}$
$6sen2x\cdot\:\:cosx=6sen^3x$
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