$$x^2-9x+63$$

$$3\left(f+10g\right)$$

$$\lim_{n\to\infty}\left(n^22^{-n}\right)$$

$$2x^2+5\left(x-1\right)=x^2+9$$

$$\frac{625x^4-125x^3+10x^2}{25x^2}$$

$$\int x\cdot e^{\frac{ax}{g}}dx$$

$$\left(10j^5+6k^4\right)^3$$