sympy.
sympy is a system for symbolic maths in python. It doesn't just compute, it also differentiates, integrates and automates common calculus steps. The documentation for it can be found here.
Episode Notes
The code from this video is listed below.
import sympy as sp
l, w = sp.symbols("l, w")
area = l * w
circumference = 2 * l + 2 * w
sp.solve(sp.Eq(circumference, 10), l)
sp.solve(sp.diff(area.subs(l, -w + 5), w), w)
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