simplify of 24+ of 18- of 21

Answer 1

You still haven't answered
What does "+ of" mean?

If all you mean to write is
simplify 24+18-21
then just do one of the following:
(a) get out your calculator and do the math
(b) type the expression into google or any of many online calculators
(c) trust me, it's 21

Answer 2

Pls help me and the God whom I serve will bless you but just help me

Answer 3

Pls just help me......😂😂😂😂😏