That is, math problems involve other subjects, but the main problem is mathematical calculation. For example, tell you how many grams the mass of an object is, and then tell you the density of the object. The problem is to find the volume of an object. You know, density * volume = mass. Do it. The basic problem is calculation. Don't think too complicated, it is generally a basic common sense formula. Then there is a set of formulas to calculate, without much skill. Generally interdisciplinary problems are relatively simple.