$\int\left(tan^6\left(\frac{\pi}{6}\right)sec^2\left(\frac{\pi}{6}\right)\right)dx$

$\lim_{x\to0}\left(\frac{11x^3+8x^2}{8x^3-12}\right)$

$1.3a+2.4a$

$sen\left(b\right)^2+cos\left(b\right)^2+\tan\left(b\right)^2=\sec\left(b\right)^2$

$4t+3t$

$\left(x+a\right)^2-2\left(x+a\right)$

$\frac{1}{tan\left(x\right)+cot\left(x\right)}\:=\:\frac{1}{2}sin2x$