$$\frac{dy}{dx}\left(\frac{t}{x^3}+\frac{x}{t}\right)$$

$$\int4x^2\cdot\sin xdx$$

$$2\cos\left(x\right)+\left(\frac{7}{\cos\left(x\right)}\right)=0$$

$$\log_b\left(x\right)+\log_b\left(x-4\right)=\log_b\left(12\right)$$

$$6.03^3$$

$$\frac{dy}{dt}=\frac{y}{4t+ty^2}$$