Question 237479
you can use nested parentheses


((((((a/2 -1)/2 -1)/2 -1)/2 -1)/2 -1)/2 -1) = 3


adding 1 and multiplying by 2 ___ = 8


adding 1 and multiplying by 2 ___ = 18


adding 1 and multiplying by 2 ___ = 38


adding 1 and multiplying by 2 ___ = 78


adding 1 and multiplying by 2 ___ = 158


adding 1 and multiplying by 2 ___ = 318