$\left(2xy^2-9xy^3\right)\left(2xy+3xy^3\right)$
$\frac{x^{-4}}{-4}$
$\log\left(10^{-2m}\right)$
$4x^3-9x+6x^2-19-\left(-11x^2+21x-43+6x^3\right)$
$cos^{\left(2\right)}\theta\:+2cos\theta\:+1=0$
$\lim_{x\to\infty}\left(\left(\frac{1.25.x^2}{x^4+0.25\cdot x^2}\right)^2\right)$
$3a^1b^7+3a^1b^7$
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