All students in the (a) class are participating in at least one art or music class. There are 35 students in the art class and 32 students in the music class. If the number of students participating in both classes is 19, how many students are in the  (a) class?
35 32 [OP_ADD] 19 [OP_SUB]
var_a = 35
var_b = 32
var_c = var_a + var_b
var_d = 19
var_e = var_c - var_d
print(int(var_e))