A series is 218, 230, 200, 256, 166, 298
If another series is 39, ____, (z), (x), ____, (y), which follows the same pattern as the series given above, then find the value of (?) in the given equation (y + 244) - z = x + (?).
1
(z)2 - 176
2
270
3
y + 123
4
(x)2 - (y)2
5
None of these