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{2r+1+(−4r)+72r+1+(-4r)+7}

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Full solution

Q. {2r+1+(−4r)+72r+1+(-4r)+7}
  1. Combine like terms: Combine like terms: 2r2r and −4r-4r. 2r+(−4r)=−2r2r + (-4r) = -2r
  2. Combine constants: Combine constants: 11 and 77. 1+7=81 + 7 = 8
  3. Combine results: Combine the results from the previous steps: −2r-2r and 88. −2r+8-2r + 8

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