$2a\:-\:b\:-\:4\:-\:6a\:+\:3a\:+\:5b\:-\:3\:\:$
$\sqrt[5]{m\cdot n}$
$x2\:+12x\:-\:6\:=\:0$
$\int90\sec\left(a\right)\tan\left(a\right)\:da$
$5m+4m$
$z=3x-20y+8z$
$\sec\left(v\right)-tan\left(v\right)=\:\frac{cos\left(v\right)}{1+sin\left(v\right)}$
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