studying is pure mathematics which isn't intended to solve social, economic, or industrial problems. Mathematics at its purest is the only mathematics I would recommend learning. Learning practical mathematics deprives you of the true mathematics expeierience. The only way to truly understand mathematics is to a. derive expressions yourself and b. derive new expressions using previous equations as building blocks. Applied mathematics is essentially plug and chug. You put the values in the equation and get an an output but have a lack of understanding of how the equation was derived, not can you apply that knowledge to create new expressions.