Ответ:
2c-2c²-(c²+4c-2c-8)=2c-2c²-(c²+2c-8)=2c-2c²-c²-2c+8=c²+8
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Ответ:
2c-2c²-(c²+4c-2c-8)=2c-2c²-(c²+2c-8)=2c-2c²-c²-2c+8=c²+8