$\int\frac{3x^{2}+3}{\sqrt{x^{3}+3x+1}}dx$
$f\left(x\right)=10\left(t^3-9\right)^5$
$164+745$
$\frac{x-1}{x-4}=\frac{2}{x-4}$
$4x^2-2x-23$
$\frac{1-cosx}{sin\left(x\right)}-\frac{sin\left(x\right)}{1+cos\left(x\right)}$
$\int_1^e\:\frac{\left(ln^2x\right)}{x}dx$
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