decipher challenge

salam...

got this message from my friend just now.
at first, it looks hard to decipher but it really bothers me to decipher it.
fortunately, with the help of my housemate, we could find the answer :D

the challenge is try to decipher this code!
(this is not a contest, but if you know the answer, please comment!)

[(letter before g)+(Real number)+(sin90)+(elog10)+(unit of force)+(half moon)+(twin of 5)]
[(flag without lag)+(cos90)+(radius of earth)+(image of 3)+(half of diamond)+(5th letter)+(P with 2 legs)]

the answer is nice!