$-x+9x^2-27+27$

$2x^2-16x+5$

$\left[\left(n+2\right)\left(n-2\right)\left(n^2-4\right)\right]^3$

$\frac{sinx+cosx+\frac{-1}{sin}}{cosx}=\frac{sinx-cosx}{sinx}$

$\ln\left(\frac{x^9\sqrt{x^2+2}}{\left(x+2\right)^6}\right)$

$\int11x\cdot e^{-12x}$

$y\left(1-x^2\right)dy=\left(y+1\right)^2dx$