solve THIS math problem

[Hansome duded]

2+2

[Ad Bot]

[TableSalt]

4

/thread

[Insert Name Here²]

21 xDDD

[Pngu12970]

5

[The Resonte!]

maxwell where are you

[Master Matthew²]

9/11

[Tactical Nuke]

oral love

[Masterlegodude]

Fish

[TableSalt]

guYS I SAID /THREAD WHYA RE YOU STILL pOSTiNG

[Yellow Snow]

5

[Ragequit]

22 lol

[Frequency]

can't believe no one said 2 yet

[SubDaWoofer]

......10
IN BASE 4 IM FINE

[ArmyUnit]

100 in base 2

[kongo]

unsolvable