Problem: what is the remainder if 7 ^ 16 is divided by 100 ?
Rationale: "7 ^ 16 can be written as ( 7 ^ 4 ) ^ 4 if we divide 7 ^ 4 by 100 the reminder is 1 so , ( 7 ^ 4 ) ^ 4 by 100 , the reminder is 1 ^ 4 = 1 answer : d"
annotated_formula: subtract(divide(100, const_2), multiply(7, 7))