$\lim_{x\to-5}\left(\frac{\sqrt{21+3x}-4x+2}{\sqrt[3]{3}x\:-6x+8}\right)$
$\sqrt{2n}^2$
$6\:-\:n\:-\:11$
$63\le-4x-17$
$x^2+8x<-15$
$\left(\frac{3}{2}ax^2+\frac{1}{4}a\right)^2$
$\int\frac{72}{\left(x+1\right)}dx$
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