Question

a+(b+c-d)-(c-f)
a+(-b-c)-(-d-c-f)
a-(-b+c)-(d+c-f)
a+(b-c-d)+(c+f)
Раскройте скобки:
a+(b+c)+(d-c-f)
a+(b+c)-(c-f)

Answer 1

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