$\frac{3x}{2x^{2}-5}\cdot\frac{-2x+5}{6x-9x^{2}}$

$56-\left(-42\right)$

$y'+y=3$

$\lim_{x\to1}\left(\frac{x^3-x^2+x-1}{x-1}\right)$

$\left(x+4y+z\right)\left(x-4y-z\right)$

$\int\:\left[-4x+\left(2\right)+\frac{\left(-6\right)}{\left(-4\right)\:\sqrt{x}}\:+\frac{\left(2\right)}{\left(-6\right)\:\sqrt[4]{x}}\:+\frac{\left(-2\right)}{\left(2\right)\:x^6}\right]\:dx$

$2\left(555-\left(-48\right)\right)-21$