$\frac{49m^3n^4}{63m^3n}$
$3t\:+\:9\left(4t\:+\:6\right)$
$\sqrt{10^2-8^2}$
$\lim_{x\to0}\frac{\cos\left(x+3x^2\right)-e^{-\frac{x^2}{2}}}{x^2\tan\left(x\right)}$
$5\left(9k+2\right)+8\left(3+4k\right)$
$70=7m$
$2\left(x+3\right)>5+3\left(2x-1\right)$
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