I've used calculus very little, algebra quite a lot. One of the side-benefits of learning calculus (apart from reading others' work) is how much solving those p

I've used calculus very little, algebra quite a lot. One of the side-benefits of learning calculus (apart from reading others' work) is how much solving those problems reinforces your algebra skills. Solving one scary calculus problem thrown at me as an undergrad - an integral - resulted in a solution which broke it into 16 separate integrals. Days of algebra were involved.