$\int\left(9x-4\right)ln\left(x\right)dx$
$-6<2x-4$
$\:-3\cdot5+7-3\cdot4-10\cdot2$
$\frac{1-\cos\left(x\right)^2}{1-\sin\left(x\right)^2}=\tan\left(x\right)^2$
$\left(6\cdot4\right)\frac{2}{3}$
$\left(-5a+3a^2\right)^2$
$\frac{4m^2-25}{2m+5}$
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