$5mx+2=3m+x$
$2x^2-4x+1<\:0$
$\int\:\frac{\left(4x+7\right)}{\left(2x^2+7x\right)^6}\:dx$
$6x+18-3x-9$
$\sin\left(90.1\right)$
$\left(+14\right)-\left(-12\right)$
$\frac{1}{2}\cdot7\left(15+5\right)$
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