$$\lim_{x\to\infty}\left(\frac{e^{\left(4x\right)}-1-4x}{x^2}\right)$$

$$\frac{\cos\left(x\right)+\frac{\sin\left(x\right)\sin\left(x\right)}{\cos\left(x\right)}}{\tan\left(x\right)}=\csc\left(x\right)$$

$$\log\left(\frac{x^2}{3}\right)=\log\left(5x\right)$$

$$\left(320+389\right)+\left(798-84\right)$$

$$\frac{dy}{dx}=4\left(x\right)^2-3$$

$$120:15$$

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