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+-SH dead source48455 +-SH safe2226271 +-SH artist:reddgeist19 +-SH twilight sparkle365344 +-SH human258982 +-SH g42087749 +-SH book44939 +-SH breasts405040 +-SH busty twilight sparkle16948 +-SH chalkboard3724 +-SH classroom2288 +-SH cleavage48321 +-SH curvy10454 +-SH fancy mathematics264 +-SH female1862350 +-SH glasses92105 +-SH high res410928 +-SH humanized122459 +-SH math992 +-SH school2476 +-SH solo1471262 +-SH teacher1261
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Quantum mechanics, from the presence of the h-bar and the operators. Can’t tell precisely.