$\left(x+7\right)\left(w-4\right)$
$+300+9-81+0$
$\lim\:_{x\to\:\frac{\pi\:}{2}}\left(\frac{1+cosx-sinx}{sinx+cosx-1\:}\right)$
$0.792-0.083$
$16a^2+40ab^2+40b^2$
$\int\frac{10}{\left(x+3\right)^3}dx$
$\frac{6}{x}+\frac{7}{5x^2}$
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