$\int\left(1+x^2\right)\left(1+x\right)dx$
$cos\left(a\right)cos\left(a+b\right)=cos\left(a\right)sin\left(a\right)$
$34=3^n+7$
$\int_0^3\left(\left(x^2+3\right)-\left(2x+6\right)\right)dx$
$\frac{-160}{-20}$
$5\sqrt{2}\:.\:6\sqrt{3}$
$\frac{\left(3^2+3\right)}{-6}$
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