$8ba^2x+2ab^3a^2x^3-4a^2b^2a^2$
$f\left(x\right)=1x^4+2x^3-4x^2-10x-5$
$2x^3-2x^3+3x^2+5x-4x-3$
$\lim_{x\to0}\left(-3sin\left(x\right)\right)$
$\frac{\ln\left(0.87\right)}{-0.00012}$
$\frac{1}{1-sin\:^2a}=1+\tan^2a$
$\frac{36m^2-9}{6m+3}$
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