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 minus 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 minus 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