print 100 # => 100
print -50 # => -50
print 1-1  # => 0
print 1 -1 # => 0
print 1 - -1 # => 2
print 100 + -50 # => 50
print -50 + 100 + -50 # => 0
print 2 + 3 * 4  #=> 14
print 20 - 3 * 4 #=> 8
print 2 + 6 / 3  #=> 4
print 2 - 6 / 3  #=> 0
print 5 < 6 # => true
print 5 <= 5 # => true
print 5 > 6 # => false
print 5 >= 5 # => true