$$\left(5m^2-n\right)^2$$

$$\frac{\infty^4+3\left(\infty\right)^7-\infty-2}{4\left(\infty\right)-\infty^6-5\left(\infty\right)^2-9\left(\infty\right)^7}$$

$$\int_0^{49}\left(\frac{x^2}{\sqrt{2401-x^2}}\right)dx$$

$$\lim_{x\to\infty}\left(\frac{\left(x-1\right)}{x+3}\right)^x$$

$$\frac{2z^3-z^2+2z+3}{z-2}$$

$$-8.3\:x\:-6.4$$