$$g=3x+4,5y$$

$$36r^2-25t^2$$

$$sin\:\frac{x}{2}=-\frac{\sqrt{2}}{2}$$

$$\int4x\left(\sqrt{2x+7}\right)dx$$

$$\frac{\csc a}{\sin a}-1=\cot^2\left(a\right)$$

$$\sqrt[3]{25}\cdot\sqrt[3]{5}\sqrt{16}+3$$

$$18x^3-12x^2+8x$$