$\int_{\pi}^{\frac{\pi}{2}}\left(cos4x\right)dx$

$\lim_{x\to2}\left(\frac{12x-60}{x^2-6x+5}\right)$

$\left(3x^3\right)^4$

$\sec\left(x\right)\cdot\tan^2\left(x\right)\cdot\sec\left(x\right)$

$\left(6+2\cdot2\right)$

$8\left(27\right)\left(\frac{2}{9}\right)$

$-\left\{50+\left[-70+\left(-10+30+40\right)-20\right]-8\right\}$