$149.6\cdot10^6$

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

$\frac{4x^2+21x+48}{x+7}$

$11abc-12abc+6abc-5abc$

$\left(\frac{2}{3}m^2x-5n^3z^2\right)^2$

$\log\left(\sqrt{a^2+x^2+x}\right)$

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