$4.5+0.25+2.75+3$

$\int\left(5x-2\right)^7dx$

$b^2-2b-35=0$

$\left(4f-\frac{g}{2}\right)\left(16f^2+2fg+\frac{g^2}{4}\right)$

$\int\left(\frac{2x+4}{\sqrt{4x-x^2}}\right)dx$

$4x^2-15x+9$

$\lim_{x\to\frac{\pi}{2}\:}\left(\frac{20x\:\:-10\pi}{cos\left(2\:\pi\:-x\right)}\right)$