Frosh/soph level math is generally fairly standardized, with a small number of exceptions (Caltech, Harvey Mudd), although course boundaries relative to the material covered may not fall in the same places at different schools. AP calculus credit is commonly allowed for subject credit or advanced placement.
Frosh/soph level CS tends to be much more variable in how it is organized and the type of assignments, projects, and computer languages used. AP CS credit is less likely than AP calculus credit to be allowed for subject credit or advanced placement.
Frosh/soph level biology, chemistry, and physics are mostly similar in topics covered, but the level of depth and rigor (and use of math in physics and sometimes chemistry) can vary, so some schools do not accept AP scores for subject credit in some or all of those subjects.