The phrase "study at belligerent" carries a negative connotation due to the word "belligerent," which implies aggression and hostility. To avoid using such a negative phrase, one can use alternative expressions. For instance, one can say "attend a challenging educational institution" or "enroll in a rigorous academic program." Such expressions are more positive and convey a sense of academic excellence and intellectual rigor. Other synonyms for "study at belligerent" include "pursue an education at a demanding institution," "take courses at an intellectually stimulating college," or "enroll in a highly competitive academic program." No matter which phrase is used, the key is to convey a sense of academic challenge and ambition, without resorting to negative language.