C+I\mathrm {C+ I}C+I
C+I+G\mathrm {C+I+G}C+I+G
C+I+G+(X−M)\mathrm {C+I+G+(X-M)}C+I+G+(X−M)
C=I+(X−M)\mathrm { C=I+(X-M)}C=I+(X−M)