$$\lim_{x\to0}\frac{y}{y^4}$$

$$598-31$$

$$\frac{d}{dx}\left(y=5ln\left(3lnx\right)\right)$$

$$\left(-74\right)\cdot\left(-3\right)$$

$$\left(\frac{4}{5}x^2-\frac{1}{3}y^3\right)^2$$

$$3m^4n+5n-8m^4n+2n^4+6m^4n$$

$$2\cdot\left(\sec\left(\frac{\pi}{8}\right)+\csc\left(\frac{\pi\:}{8}\right)\right)$$