-x^3(1-x^2)^-1/2 - 2x(1-x^2)^1/2
--------------------------------------
x^4
This is what I've been doing
-x^3(1-x^2)^-1/2 - 2x(1-x^2)^1/2 x (1-x^2)^1/2
--------------------------------------
x^4 x (1-x^2)^1/2
-x^3-2x(1-x^2)
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x^4 <--------------- This is the part I'm stuck on!!!
How do you continue working this problem?? Thanks in advance for the help!!