$3\pi-\pi$

$\left(\frac{a}{2}\right)^4\frac{\left(8a^5\right)^2}{a^{-1}a^{10}}$

$\sqrt{\sin^2\left(x\right)+\cos^2\left(x\right)+\tan^2\left(x\right)}$

$x^3+y^3=2$

$sin^2x\left(cscx-sinx\right)$

$\lim_{x\to0}\frac{\cos\left(x+3x^2\right)-e^{-\frac{x^2}{2}}}{x^2\tan\left(x\right)}$

$0.5\left(-4\right)$