$\frac{x^2-1}{2x^2-x-1}$
$\frac{d^5}{dx^5}\left(\tanh\left(x\right)\right)$
$16\:+\:24b\:+\:36b^2$
$g\left(x\right)=5x\left(x-16\right)^2\left(x-2\right)^2$
$x+11=0$
$0,6x^2.\:\left(-3x+\frac{9}{2}x^3+6x^5\right)$
$\left(\sqrt{x}-10\right)\left(\sqrt{x}+10\right)$
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