$20m^5-15m^3+5m$
$7\left(sin\left(x\right)\right)^2\cdot\left(\tan\left(x\right)\right)^2$
$\frac{6}{\sqrt{x+y}}$
$x^2+4x+3>0$
$\int\frac{x^2+x+1}{\left(x^2+5\right)}dx$
$\left(m^2\:t\:\:n^2-mn\right)\left(2m\right)$
$-4x\left(2x-1\right)-9x\left(2x-3\right)$
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