$$\frac{26.91864}{2e^5}$$

$$\frac{1-\sin\left(m\right)}{1+\sin\left(m\right)}=\left(\sec\left(m\right)-\tan\left(m\right)\right)^2$$

$$\left(\frac{3}{4}mn+6\right)^2$$

$$71\cdot4$$

$$\lim_{x\to0}x^{15}\ln\left(x\right)$$

$$\frac{d}{dx}\frac{7x+6}{y}=7x+y^2$$