$$-\frac{\pi}{6}\cot\left(\frac{\pi}{6}\right)+\ln\left(\sin\left(\frac{\pi}{6}\right)\right)$$

$$\left(2+s\right)^2$$

$$f\left(x\right)=\frac{1}{sin^2x-cos^2x}$$

$$\int_1^t\left(\frac{.23}{x^{.9}}\right)dx$$

$$\frac{d}{dx}\left(e^{\left(\frac{\left(x+y\right)}{4}\right)}+tan\left(ln\left(\frac{x}{y}\right)\right)=e^{sqrt\left(y\right)}\right)$$

$$dx+e^{3x}dy=0,y\left(0\right)=2$$