Providing additional algorithms

[shrabian]

Hello,

I wanted to add my own implementation of an algorithm that approximates the length of a curve and one which approximates the area under a curve (where the curve is defined by a function).

If that's alright, could you also please indicate which folder I should push to.

Thanks!

[poyea]

You can put it under the math/ directory. Thank you in advance! Feel free to reference this issue when you create the PR.

[cclauss]

Please read CONTRIBUTING.md before contributing. ;-)

[github-actions]

Stale issue message

[cclauss]

Closed in #1692