Racket (https://racket-lang.org https://racket-lang.org) has quite a lot of mathematics support (rationals as ratios, imaginary numbers, exponentiation, implici

Racket (https://racket-lang.org https://racket-lang.org) has quite a lot of mathematics support (rationals as ratios, imaginary numbers, exponentiation, implicit integer->float coercion), and comes with a dedicated IDE, although it's a lisp, and I don't know if you'd like that (I certainly do).