Which of the following functions has the greatest number of discontinuities?

W) \(\frac{3x+5}{x-4}\) [quantity three x plus five, divided by quantity x minus 4]

X)(\(\frac{1}{(x-})+x\) [ open parenthesis one, divided by quantity x minus 1, close parenthesis, plus x]

Y) \(\frac{1}{x^{2}}\) [one divided by x squared]

Z) \(\frac{1}{x^{2}-1}\) [one, divided by quantity x squared minus one]
Z) \(\frac{1}{x^{2}-1}\)