$$\left(7x^2+1\right)\left(3x^2+2\right)$$

$$25x^2-100x\left(6x-y\right)^2$$

$$-\frac{6}{5}-\frac{2}{5}v+\frac{4}{15}+\frac{1}{3}v$$

$$4^6\:\cdot\:8^3$$

$$\frac{a^9}{a^3}$$

$$22\frac{3}{4}+\left(-6\frac{1}{4}\right)$$

$$\int\frac{\sin\left(4x\right)}{\cos\left(4x\right)+5}dx$$