I haven't played it in a long time. Are you talking about those super tanks that you have to stealthily line up the shot? If so take them one at a time use the hover mode to strafe around as needed until op line up the shot.
If you're talking about the manhole cover bomb ones where you have to take out a ton of tanks. Upgrade the hack ability and get a few on your side.
Youtube probably has tons of guides about this.
Thanks for your reply outwar6010, yes I mean the super tanks that can only be destroyed from behind, finding 3 a bit tricky to deal with, as they do not spread out much, so get behind one and then the others show up, and I'm a goner 🙁