1.)

#Find: \s{2,}
#Replace: , 

2.)

#Find: (\w+),\s(\w+), (.*)
#Replace:\2 \1 (\3)

3.)

#Find: \s(\d{3,})
#Replace: n \1

b.)

#Find: (\d{4})(.*)(\w+)(\.\w+)
#Replace: \2 \3_\1\4

#Find: (\w)\w+,(\w\w+),\d+.\d+,(\d*)
#Replace: \1_\2, \3

b.)

#Find: (\w)\w+,(\w{4})(\w+),\d+.\d+,(\d*)
#Replace: \1_\2, \4