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Clear layer M0:
!layer M0 0
Copy M1 to layer NEW:
!layer NEW M1
Copy the inverse of layer M1 to layer NEW:
!layer NEW !M1
Copy the intersection areas of I1 and I2 to NEW:
!layer NEW I1&I2
Copy the R1 and R2 areas to NEW:
!layer NEW R1|R2

Stephen R. Whiteley 2017-04-09