"the ABC and the 123" are no longer sufficient. we need the xyz (allusion to algebra) AND the fgh, which stand in for the f(x), the g(y), and the h(z) better kn

"the ABC and the 123" are no longer sufficient. we need the xyz (allusion to algebra) AND the fgh, which stand in for the f(x), the g(y), and the h(z) better known as functions, BUT at the depth of lambda calculi. and yes, for children, because computers.