Nating Configuration

RouterOS Beginner Basics
1

Hi
How to configure Source nat to specific Single Real IP
10.128.1.2-10.128.1.254 === 97.77.104.25
10.128.2.2-10.128.2.254 === 97.77.104.25
10.128.3.2-10.128.3.254 === 97.77.104.25
10.128.4.2-10.128.4.254 === 97.77.104.25
10.128.5.2-10.128.5.254 === 97.77.104.25

Best regard

2 
add action=src-nat to-addresses=97.77.104.25 to-ports=0-65535 chain=srcnat comment="Masq WAN" dst-address=0.0.0.0/0 src-address=10.128.1.0/21

or

add action=src-nat to-addresses=97.77.104.25 to-ports=0-65535 chain=srcnat comment="Masq WAN" dst-address=0.0.0.0/0 src-address=10.128.1.0/24
add action=src-nat to-addresses=97.77.104.25 to-ports=0-65535 chain=srcnat comment="Masq WAN" dst-address=0.0.0.0/0 src-address=10.128.2.0/24
add action=src-nat to-addresses=97.77.104.25 to-ports=0-65535 chain=srcnat comment="Masq WAN" dst-address=0.0.0.0/0 src-address=10.128.3.0/24
add action=src-nat to-addresses=97.77.104.25 to-ports=0-65535 chain=srcnat comment="Masq WAN" dst-address=0.0.0.0/0 src-address=10.128.4.0/24
add action=src-nat to-addresses=97.77.104.25 to-ports=0-65535 chain=srcnat comment="Masq WAN" dst-address=0.0.0.0/0 src-address=10.128.5.0/24
3

thanks a lot