$9m+12\cdot9m-12$

$\left(c-7\right)^2$

$\int_{-\infty}^{-5}\left(\frac{x-6}{\left(x-2\right)\left(x^2+2x+17\right)}\right)dx$

$\frac{\left(e^x+y+\frac{\left(e^x\right)}{y}\right)}{y-\frac{\left(e^x\right)}{y}}$

$\frac{x^4-6x^3+8x^2+12}{x-4}$

$-2sin2xsinx+cosx=0$

$\left(a^2-6a+9\right)$