What is this fast growing weed ?

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Can someone identify these vigorous growing weeds they run. They creep under my fence from a home in back of me. I pull them up and they grow right back !
q what is this fast growing weed
Notice the baby leaves and the mature bright green leaves.
q what is this fast growing weed
They also have runners that grow up, down and around.
q what is this fast growing weed
This one is under my planter bench. The runners are red and have new leaves growing.
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