Re: maths

Posted by Amit Goyal on Sep 17, 2019; 6:27am
URL: http://discussion-forum.276.s1.nabble.com/maths-tp7616177p7616178.html

Refer to these videos on youtube :
https://youtu.be/kiF6SGanEuQ
https://youtu.be/MvKDAW0waiU