$\lim_{x\to0}\left(\frac{e^x-\sin\left(x\right)-1}{1-\cos\left(x\right)}\right)$

$5b^2\:+\:4\:=\:-12b$

$25t^2+60t+36$

$\left(x+4\right)x\left(x+10\right)$

$\int\left(20x^3\sqrt[3]{\left(5x^4+5\right)^2}\right)dx$

$2\left(-3\right)\left(2\right)^2+3\left(-1\right)^4$

$x^{x+x^2}$