two *x/x^ two - two *(x^ two + one)/x^ three = zero
2 multiply by x divide by x squared minus 2 multiply by (x squared plus 1) divide by x cubed equally 0
two multiply by x divide by x to the power of two minus two multiply by (x to the power of two plus one) divide by x to the power of three equally zero
2*x/x2 - 2*(x2 + 1)/x3 = 0
2*x/x2 - 2*x2 + 1/x3 = 0
2*x/x² - 2*(x² + 1)/x³ = 0
2*x/x to the power of 2 - 2*(x to the power of 2 + 1)/x to the power of 3 = 0