$$x^5tanh^{-1}\left(7x\right)\:$$

$$\frac{\left(e^{-x}cos^2x\right)}{x^2+x+1}$$

$$\frac{x^{-1}y}{xy^{-2}}$$

$$\left(12z+4y^3\right)$$

$$f\left(x\right)=3x^2-4x+10x$$

$$200+5a\:8ca$$

$$\int_0^{+\infty}\left(2\right)dx$$