$\sin\left(\frac{\pi}{6}\right)\cos\left(\frac{\pi}{4}\right)-\cos\left(\frac{\pi}{6}\right)\sin\left(\frac{\pi}{4}\right)$

$\lim_{x\to\frac{\pi}{4}}\left(4\left(tan\left(x\right)\right)^{tan\left(2x\right)}\right)$

$i ^ { 0 }$

$a^6-32a^4+18a^3+247a^2-162a-360$

$\frac{1}{2}-\frac{7}{9x}=\frac{4}{9}-\frac{1}{6x}$

$f\left(x\right)=\left(x^2+2x\right)\left(-8x^3-5x\right)$

$5^{12}-23^6$