(1+2i)(2-1)
The value of
3+4i
is equal to

assuming you are in the home page.

1) go to the upper right hand corner

2) click on your "profile picture"

3) go down to "edit profile"

4) it should be titled as "edit your profile", click on "profile picture"

5) choose a file

6) press "change"

you're profile picture is updated

~

is this supposed to be a question ?

do not use any of these common illegal characters/symbols:

# pound

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} right curly bracket

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< left angle bracket

> right angle bracket

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  blank spaces

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: colon

@ at sign