$w^2-6w+9\le0$
$\int\left(2x+3\right)\left(2x^2+6x-5\right)^4dx$
$x\sqrt{x-7}+4\sqrt{x-7}=0$
$x^2\:+\:5x\:+\:25$
$1+2x+4$
$\frac{\left(-1\right)^{n+1}}{n\:10^n}\left(x-2\right)^n$
$9.1\cdot81$
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