$$\left(n+7\right)x^n$$

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

$$\left(15f-56n\right)^2$$

$$3^5+3^2+\sqrt[3]{-27.\left(-8\right)}-2$$

$$2t\left(1-\left(y-t^2\right)^2\right)$$

$$\int\frac{x^3+2x-1}{\left(4x^2+3\right)\left(x^2+4\right)}dx$$

$$\int\frac{1}{\left(16x^2-2\right)}dx$$