$b^2+b^2+b^3+b$

$2704-2x-52$

$\lim_{x\to0}\left(\frac{\sqrt{x+3}\sqrt{3}}{x}\right)$

$2\log_a\left(x\right)-\log_a\left(y\right)$

$r\left(5+2r\right)-5-2r$

$\left(-3.189\right)\:-\:\left(-1.218\right)$

$23\:+\:\left(-15\right)\:+\:33\:+\:\left(-25\right)\:+\:10\:+\:\left(-7\right)\:-\left(-20\right)$