End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
https://tarafdari.pdf-doc.ir/file/62213/دانلود-فایل-طرح-درس-کتاب-ریاضی-پایه-نهم-درس-زیر-مجموعه-ها