do you have any idea to merge 2 Mb +2Mb to be 4Mb

Hi guys ..

i think my past post wasn’t lucky to get precise replay .

please as you see in above title i need the right way to merge WANs by using Mikrotik RB or MK Os .
not load balancing cause as i find out in mum 1+1 does not = 2 so , am asking the expert men on the forum to advise me also to help how can i do it using whatever MK RB and i need to get any idea to merge 2 Mb +2Mb to be 4Mb or more than 2 WANs 3 or even 8 .

thanks
Ur