CALCULUS
posted by DMITRIC .
Y=(XSQUARE + 1
OVER
XSQUARE  1) CLOSE PARENTHESIS TO THE 3 POWER...

y = [(x^2+1) /(x^21) ]^3 ???
what do you want, the derivative?
if so
dy/dx = 3[(x^2+1) /(x^21) ]^2 * { (x^21)2x (x^2+1)2x}/ (x^21)^2
etc, multiply out and simplify