I think the firse one is horseweed, actually. It doesn’t taste good but it’s not toxic so you can let it grow a bit longer to confirm.
The second one is a young sow thistle; it will get easier to identify as it grows, safe. That’s definitely horseweed to the right, you can go ahead and pull it before it gets large and hideous.
I agree the third is chamber bitter. It’s in the spurge family so best avoided.
Fourth one practically looks like a tree to me but I’m not good with anything shrubby. You might try taking a picture of it from a bit farther away. Yours is a great, clear photo but it’s difficult to get a sense of size so close up.