$\int\frac{5x^2+5x-4}{\left(x+2\right)\left(x+1\right)\left(x^2+x+1\right)}dx$

$\sec\left(\theta\right)-cos\left(\theta\right)=tan\left(\theta\right)sin\left(\theta\right)$

$\frac{-1}{\left(y+1\right)}\cdot\frac{1}{\left(6y+1\right)^2}$

$\int_{-1}^3\left(e^{3x-9}\right)dx$

$\log_{50}+\log_{200}$

$-52\::\:\left(-13\right)\:$

$-3+5+4-8+3+8-2-7-9$