Starting with a different number changes the diagram because if you started with any other number, you would get different results.
14) Since f=5, f + 69 = 74
15) Since w = 23, w + 45 = 68
There's more than one way to combine them really
but an obvious one will be
For 5 and 6 : 5 would be 144 when you put 3 in the position of the t . And 6 would be 1,024 when you put 8 where the t is .