#Vim Answer

A way to learn Vim.

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10gg # go to line 10

f{ # forward to “{“in that line

ma # put a mark “a”

10 + enter # go to 10 line below

f} # forward to “}“in that line

mb # put a mark “b”

:`a,`bs/sin/cos/gci

# replace sin by cos between mark a to b

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