The homeroom teacher expected the sum of the students' final exam scores to increase by 2152 compared to the sum of their midterm exam scores, but it only increased by 1264. What is the difference between the teacher's estimate and the actual score?
2152 1264 [OP_SUB]
var_a = 2152
var_b = 1264
var_c = var_a - var_b
print(int(var_c))