$\frac{\left(-5\right)^n}{n}\left(x-6\right)^n$
$-\frac{1}{2}\cdot x+\frac{3}{2}-1<-\frac{7}{5}\cdot x+\frac{4}{3}$
$\lim_{x\to-4}\frac{x^2-15}{x^2-16}$
$3x+8=2x-7$
$2x^2+12=14b$
$\tan^2a-\sec^2a$
$\sqrt[3]{5x^2}-6$
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