Creatures in the sea will be dead if we don't save the sea. If we litter in the sea, we will kill lots of fish, the sea is very pollution and every animals in the sea were dead under our hands. So we need to help (the and)xóa nha all creatures in the sea. I will help the sea by not littering  call everyone help.

Wiki ak?

Các nước Bắc Âu bao gồm, Phần Lan, Iceland, Na Uy, Thụy Điển

Hello Jack,

I'm really happy to see you, how are the thing?

The reason that i'm happy is my family will gathering tonight. I'm so excited!.What about your parent?

I have to go now. See you soon.

Love,

(Dấu tên)

ôk

ok

3A=3/2.5+...+3/2018.2021

3A=1/2-1/5+1/5-...+1/2018-1/2021

3A=1/2-1/2021 sau tự tính A

N=1/2+1/2²+...+1/2¹⁰

2N=1+1/2+...+1/2⁹

2N-N=1-1/2¹⁰=1-1/1024=1023/1024