As to Michigan and Chicago, subject test scores are neither required nor recommended. Those two colleges may give them some consideration if submitted and consider them only if they might help you and thus you can submit both. UCLA now recommends subject tests only if you are applying to the School of Engineering and Applied Science, and I assume you are not applying to that school since the subject tests recommended for that are a math and a science and you took history rather than a science. Submitting both will not hurt you at UCLA but may be pointless.