$\int_0^{\infty}\left(\frac{1}{1+x^2}-\frac{1}{3x+1}\right)dx$

$5-4-2+7-1-3+4$

$2\log\left(x\right)-\log\left(\frac{x+10}{2}\right)=1$

$\left(z-3f\right)^3$

$\sqrt{5y^4u}\sqrt{10y^9u}$

$\lim_{x\to0}\left(\frac{4-sin\left(4x\right)}{4-tan\left(4x\right)}\right)$

$30-\left(-20\right)$