Technique use Sum Formula (តិចនិចប្រើប្រាស់រូបមន្ត Sum លំអិត)

[@ReanGuitar168]

Good Thanks

[@Abomination1128]

Thank alot brother ,this video is very helpful

[@khimkhimsreynith2608]

អរគុណលោកគ្រូ

[@muthnarang619]

Great job

[@Rural-h4f]

Thanks brother that share it.

[@dalyadalya8082]

ពន្យល់ច្បាប់ល្អ