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If evaluate:

  1. Notice that the bounds have flipped and the integrand is now negative.

  2. Split this problem into a sum of two integrals:

    Integral 1: Notice that the bounds shifted units to the right... but so did the integrand: .

    Integral 2: This integral represents a rectangular area with base:  and height: .


  3. The bounds shifted units to the right, but the integrand shifted units to the left.

    We do not have enough information to evaluate this integral.