Comment by gus_massa

It transform a simple expression like x+y into a long chain of "eml" applications, so:

Derivatives: No. Exercise: Write the derivative of f(x)=eml(x,x)

Integrals: No. No. No. Integrals of composition are a nightmare, and here they use long composition chain like g(x)=eml(1,eml(eml(1,x),1)).