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10*10*c*2+16a=800                 
20*20/2=10*10*c/2+4a=200     
10*10=10*10*c/4+2a                                 16b+16a=800
800=10*10*c*4-16d
4d+200=10*10*c
4a+2d=100
20*20*c=800+16d=10*10*c*4
8d+8a=10*10*c
8d+16a=400
d+2a=50
4d+2e+2A=200
32d+32a=20*20*c
200+4d=10*10*c
200+4d+2e+2a=400
20*20*c+32a=1600
d=25c-50
a+e+2d=100

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