Answer: mathematics

AnswerCrossword Clue
MATHEMATICSCalculus, etc.
MATHEMATICSHigh school subject
mathematicsthe science of numbers and their operations, interrelations, combinations, generalizations, and abstractions and of space configurations and their structure, measurement, transformations, and generalizations
mathematicsThe abstract science of number, quantity, and space. Mathematics may be studied in its own right (pure mathematics), or as it is applied to other disciplines such as physics and engineering (applied mathematics)
mathematicsThe mathematical aspects of something