OverStepPieces​(AngouriMath.​Entity,​AngouriMath.​Entity.​Variable,​AngouriMath.​Entity,​AngouriMath.​Entity)

The integral as the sum of the integrals of the pieces StepPieces writes the integrand in over
the range, each with its steps replaced by their values there, so with no jump in it: floor(x^2) from 0
to 2 is (sqrt(2) - 1) + 2 (sqrt(3) - sqrt(2)) + 3 (2 - sqrt(3)), which is 5 - sqrt(2) - sqrt(3).
A piece that is a point adds nothing. Where the pieces are not proved complete, or a piece does not integrate,
the integral is left as written. https://github.com/asc-community/AngouriMath/issues/1807