var a = [
'5**3**2',
'(5**3)**2',
'5**(3**2)',
'5 ** 3 ** 2',
'5 ** 3**2',
'5**3 ** 2',
'[5,3,2]«**»',
]
a.each {|e|
"%-12s == %s\n".printf(e, eval(e))
}