$\cos b\left(\frac{3}{5}\right)$
$8+4-6-9+19-12+15-99$
$4-2x<16$
$\frac{3x}{4+5}\cdot5$
$-4\:\left(x+2\right)+2\left(3x-1\right)$
$\left(-2m^4n^{-2}\right)^5$
$\left(\frac{4}{3}y\:+3x-2z\right)\left(2x+6y-12z\right)$
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