$\lim_{x\to\pi}1-\cos\left(2x\right)$

$\frac{dy}{dx}=\frac{\cos^2\left(y\right)}{\sin^2\left(x\right)}$

$48x^2+14x+1$

$2\cdot\left(3^a-b-1\right)$

$\lim_{x\to\frac{\pi}{2}}\left(\left(\cos\left(x\right)\right)\cos\left(\tan\left(6x\right)\right)\right)$

$sinx\left(\sqrt{3}cosx-1\right)=0$

$-0.695\cdot4^2+2.78\cdot4-17.03$