We’re suckers for good-looking old-school calculators, so this interesting numerical equation-solving calculator by [Peter Balch] caught our attention. Based around the ESP32-WROOM-32 module … ...

Learn how to solve equations with brackets with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Notes do not solve equations, it computes expressions. An equation is something like x^2-1= 0, and solving it means finding the values of the 'variables' that make the equality true.