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clc
clear
syms a b c d e f g h F F1 F2 Pi Pd Pr Pt W Cm Cr A B Pc P3p
PiR1=(Pi-W)*(a-b*Pi-c*(Pi-Pd)+f*((c*(Pi-Pd))))-F
dPi=diff(PiR1,Pi,1)
M=solve('dPi=0','Pi')
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