$y=\frac{2x+3}{x^2-8x+12}$

$-4\sin\left(6\right)\ln\left|\cos\left(x\right)\right|$

$\frac{\left(cos^2\left(\theta\right)sin\left(\theta\right)-sin\left(\theta\right)sin^2\left(\theta\right)\right)}{sec\left(\theta\right)}$

$\left(x+\frac{2}{3}\right)\left(x-\frac{1}{3}\right)$

$-5\left(-8a+2\right)+4$

$\left(x^3+1\right)^2$

$164+745$