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+-SH dead source50402 +-SH safe2254082 +-SH artist:reddgeist19 +-SH twilight sparkle369394 +-SH human265441 +-SH g42114381 +-SH book45579 +-SH breasts412142 +-SH busty twilight sparkle17194 +-SH chalkboard3787 +-SH classroom2345 +-SH cleavage49124 +-SH curvy10676 +-SH fancy mathematics264 +-SH female1893983 +-SH glasses94651 +-SH high res412191 +-SH humanized123795 +-SH math1000 +-SH school2544 +-SH solo1494932 +-SH teacher1297
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Quantum mechanics, from the presence of the h-bar and the operators. Can’t tell precisely.