The first is Obama’s signature. The second is a recording of “chi xi stigma” (666 in Greek as written by Saint John in “Revelation”) and the last two are Allah and the Bismallah.
They all seem to a different depiction of the middle finger to me.
The first two look like greek letters, beta and phi in the first one and chi and ‘wiggly’ (that was what my professor called it cause he couldn’t pronounce it properly) upside-down in the second one, and the last two have the word ‘Allah’ in Arabic in them... I’m not seeing any connection between the first three at all, and the first and fourth only both have something that looks vaguely like phi in them.
They’re a recipe for marijuana brownies, signed by rama-lama-ding-dong Obama.