$$\frac{xy-1}{x}$$

$$19+1^3$$

$$\int x^2\left(x+5\right)^4dx$$

$$-18x\:\:\:=72$$

$$f\left(x\right)=\frac{\left(z^2-5\right)^3}{\left(z+4\right)^2}$$

$$\int\left(x\left(x+6\right)^8\right)dx$$

$$-\left(a^3+b\right)+5c\left(a^3+b\right)$$