$\frac{\left(1+mx\right)^{2}-\left(x+m\right)^{2}}{1-mx^{2}+m-x^{2}}$
$\int\sin\left(t\right)\cos\left(t\right)dt$
$ab^2+7ab-8a$
$4a^2+3a=22$
$-2\tan\left(x\right)^2-\tan\left(x\right)+1=0$
$-26-\left(-14-20\right)+\left(2\right)$
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