$\int_0^{\frac{\pi}{4}}\left(\tan^5\left(x\right)\sec^2\left(x\right)\right)dx$

$4x^2+5x+3=0$

$\int_0^{\infty}\left(\frac{\sqrt{x}}{3^x}\right)dx$

$4x+x-7x$

$\int_0^{\infty}\left(\frac{-11\cdot\cos\left(x\right)}{-20x}\right)dx$

$90\:+\:-71\:+\:27\:+\:-75\:+\:-66$

$\sqrt{2\left[\frac{50+k}{2}\right]+4}=8$