$tan4\left(x\right)=\frac{91}{250}$
$\int_0^1\left(\frac{1}{1+12x^2}\right)dx$
$2536\:+\:2471$
$5s^2.6s^6$
$a^2\:\left(a+b\right)-2ab\left(a+b\right)+b^2\:\left(a+b\right)$
$30a-24=5a+26$
$3ab^2+4a^2b-9ab^2$
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