$$\int\frac{5}{x^2+9x+18}dx$$

$$\left(3m-n^{-1}\right)^3$$

$$\frac{2a-3}{a-1}=\frac{2a+3}{a+1}+\frac{10}{a+1}$$

$$w^2+16w+64=0$$

$$\lim_{x\to0}\sqrt{\left(\frac{1-\cos\left(x\right)}{x^2}\right)}$$

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

$$\frac{1}{\left(z\cdot cos\left(z\right)\right)}$$