You can select either 0 of 6, or 1 of 6, or 2 of 6, or 3 of 6, or 4 of 6, or 5 of 6 by
+ + + + + ways.
Taking into account that
+ + + + + + = = 64,
the answer to the problem's question is
+ + + + + = - = 64 - 1 = 63.
ANSWER. In 63 ways.