$$144-x^2+24x$$

$$\int\:\frac{3x+5}{e^{2x}}dx$$

$$\sqrt[4]{16x^{16}y^8}$$

$$\left(20+\frac{3}{5}xy^3\right)\left(20-\frac{3}{5}xy^3\right)$$

$$\left(6h+2k\right)\left(5h+4k\right)$$

$$\int\frac{\left(x^5+x^4\right)}{\left(5x^6+6x^5\right)^2}dx$$

$$2y^{x-2}+5y^{x-2}$$