$\frac{\left(64a^6-121b^6\right)}{\left(8a^3+11b^3\right)}$

$x^2+22x+12$

$\int\frac{4x}{x^4+6x^2+5}dx$

$823,7-97.234$

$\left(\frac{2}{5}a^{\frac{2}{5}}\right)\left(\frac{5}{7}a^{\frac{1}{5}}\right)$

$\frac{d}{dx}-8x^2\:+\:5xy\:+\:y^3\:=\:-149$

$-67-\left(-98-12\right)$