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[lemma=to | □=□] □
[lemma=to | □ & □] □
Perhaps he repeated these admirable letters to various friends . More than ever , mathematicians have an opportunity to make a lasting contribution to society by helping to solve problems in such diverse fields as medicine , management , economics , government , computer science , physics , psychology , engineering , and social science . He forgot that he was himself a slave to afternoon tea . But presently he began to resent Rose 's universal amiability ; he wanted a more exclusive attachment , and he claimed as a right what before he had accepted as a favour .