$25n^2-16m^2$
$\cos\left(3x\right)\sin\left(5x^2\right)$
$\int16e^{-3x}dx$
$3a-\left(8a+3\right)$
$\frac{\left(sin\:x+cos\:x\right)^2}{1+2sin\:x\:cos\:x}=1$
$\lim_{x\to\infty}\left(\frac{4x+5}{5x^4+1}\right)$
$\lim\:_{\alpha\:\to\:\beta\:}\left(\frac{\sin\:^2\alpha\:-\sin\:^2\beta\:\:}{\alpha\:^2-\beta\:^2}\right)$
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