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Definite integral properties (algebraic)

Given:  ∫46f(x) dx=7   ~\displaystyle \int_{4}^6f(x)\,dx=7~~~ and    ∫04f(x) dx=−9 ~~~\displaystyle \int_{0}^4f(x)\,dx=-9\,.
∫06f(x) dx =\displaystyle \int_{0}^6f(x)\,dx\, =
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}