$104+263.5$
$\:m-2+m+2m+m+\frac{5}{7}+m\:\frac{5}{7}+2m-5$
$1136-1272-\:-1250$
$\lim_{x\to\infty}\left(\left(\frac{3x+1}{3x-1}\right)^{x\cdot\left(x+1\right)}\cdot e^{-\frac{2x}{3}}\right)$
$\left(13^2\right)^3\:x\:13^{-2}\:x\:13^{12}$
$x+18=15$
$18a^3+6a^2-4a$
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