 So I learned first year calculus and second year calculus and became the consultant to one end of the whole Old Campus ... I used to do all the homework for all the sections of [ first @-@ year calculus ] . I got plenty of practice in doing elementary calculus problems . I don 't think there exists a problem — ​ ​ the classical kind of pseudo reality problem which first and second @-@ year students are given — ​ ​ that I haven 't seen . " 
