$36x^2+60x+26=0$

$\int\frac{x\left(x^2+1\right)}{\left(x^2+16\right)\left(x^2+3\right)}dx$

$\frac{10x^3-15x^2+20x}{5x}$

$\int\left(\frac{1+u}{u}\right)du$

$\frac{x^2+2x+4}{\left(x+1\right)^2}$

$\frac{cos\left(\theta\right)-sin\left(\theta\right)}{sin\left(\theta\right)}+\frac{cos\left(\theta\right)+sin\left(\theta\right)}{cos\left(\theta\right)}$

$35x-5x$