Photo #2

photo #3

photo #4 - thanks!

1. Galinsoga. Weed with a cute little flower, seeds like mad. You probably want to remove it.
2. Evening primrose, oenothera biennis. It'll eventually make showy bright yellow flowers and will seed all over the place. Weed or not is a matter of opinion :)
3. Can't remember this one, but it's a common weed and I pull it when I see it.
4. Looks like a cosmos seedling. Pretty annual flower. They do sometimes reseed themselves.

1,2,3 are weeds.
4 might be a Cosmos.

1 looks like white mulberry weed

Thank you all so much - and for #4, I planted Cosmos in that spot last year so that is probably what it is.

Thanks for all of your help!