Newton's method for 2 variables non-linear system

With this code, any 2 equation (non-linear) system can be solved by the newton's method.

This code solves any 2 non-linear equations by newton's method entered by the user. with little alterations this code can work for more variables as well. The user will have to include the extra variables being used in 2+ equations system along with slight modifications in the first loop and the line of code taking Jacobian and declaring strings as inline functions.