$\left(3^{-8}\cdot9^3\cdot3^8\cdot9^{-3}\right)-11$

$\frac{12x^2-9x+4}{2x^2+3x-2}$

$\left(3s\right)^2-2\cdot3s\cdot5t^2+\left(5t^2\right)^2$

$\int x^4\left(5+4x^5\right)^{11}dx$

$\left(60a+10b-9c+d-4\right)-\left(a+100b-6c+8d-9\right)$

$-4\left(8n-9\right)$

$\log_b\left(mn\right)=\log_b\left(m\right)+\log_b\left(n\right)$