There are 56 pear trees. There are 18 more pear trees than apple trees, and 12 fewer tangerine trees than apple trees. How many tangerine trees are there in all?
56 18 [OP_SUB] 12 [OP_SUB]
var_a = 56
var_b = 18
var_c = var_a - var_b
var_d = 12
var_e = var_c - var_d
print(int(var_e))