$\frac{x^{5}-1}{\frac{1+x}{1+1}}$
$15y^5\:+\:9y^4\:-\:6y^2$
$\frac{sin^2b}{1+cosb}$
$1\:-\:\:-\:6\:+\:8\:+\:1$
$4x=52$
$-3a^2b^3+4a^3b-ab^2+b$
$\frac{x^3}{2}.\left(4x^{-7}\right)^2$
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