Doubts about my mikrotik

RouterOS Beginner Basics
1

I have a hex mikrotik, model RB750Gr3, can i do a load balance with 3 internet? If i can’t which model i have to buy?

2

Yes, why not?

3

YEs…
It has 5 ports, of which four could be used for WAN and one for LAN for example.
https://mum.mikrotik.com/presentations/US12/steve.pdf