$x^2+x+1<0$
$-24^0$
$\int4x^2tan^{-1}xdx$
$\frac{\left(\left(x+3\right)^2\right)}{\left(x+2\right)^5\left(x+4\right)^7}$
$5.7\cdot9.1$
$\lim_{x\to0}\left(2+e^x\right)\left(\frac{1}{x}\right)$
$\int\frac{9}{x\sqrt{x^2-9}}dx$
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