First we have proportional parts of all numbers up to 100; then on one page three-place logarithms of numbers and of the six trigonometric functions, natural and logarithmic.

This leads to the solution of equations of the form $$\int_S g (Q) \log|P - Q|dS (Q) = h (P), \quad P \in S.$$ This equation is reformulated using a special change of variable, leading to a new ...