$$f(h) = h \sin \frac1h$$

A student who can solve the integration problems in Demidovich unassisted is effectively immune to being "stumped" by standard engineering calculus problems.

Many educators argue that because computers can compute any integral instantly, the value of Demidovich has increased —not as a calculator substitute, but as a logic and endurance trainer. Solving a Demidovich problem requires:

It is a "brute force" method of learning. By the time you finish a section in Demidovich, you don't just understand the concept; you have performed the operation so many times that it becomes muscle memory.

Boris Demidovich was a Soviet mathematician born in 1896 in Kharkov, Ukraine. He made significant contributions to various areas of mathematics, including calculus, differential equations, and numerical analysis. Demidovich was a professor at the Moscow State University and authored several influential mathematics textbooks, including "Problems in Mathematical Analysis," which has been widely used by students and mathematicians for decades.