$\int\left(6x\ln\left(x\right)^2\right)dx$

$\frac{\cos\left(-b\right)}{\sec\left(-b\right)+\tan\left(-b\right)}=1+\sin b$

$4c^2+16cd-16d^2$

$\ln\left(2x+15\right)-\ln\left(x\right)=\ln\left(3\right)$

$\int\frac{3x-2}{x\left(x^2-9\right)}dx$

$4x\:\left(6x\:+\:2\right)$

$\frac{\left(2x^4-3x^3+8x^2-6x+5\right)}{\left(2x-x+5\right)}$