$$\left(\frac{1}{3}n+\frac{4}{1}\right)$$

$$\int\left(x^3e^{-3}\right)dx$$

$$\frac{d}{dx}\:y=5x^4+4\:sin\:x$$

$$3\tan\left(x\right)\cos\left(x\right)+1=0$$

$$5a\:y\:2a+a-5$$

$$\lim_{x\to\infty}\left(\frac{x^2-10x+10}{x^2-8x+15}\right)$$

$$\left(-3\right)\left(4\right)\left(5\right)\left(-4\right)$$