यदि $\int_{0}^{1} 4 \cot^{-1}(1-x+x^{2}) dx = a \tan^{-1}(2) - b \log_{e}(5)$,जहाँ $a, b \in N$,तो $(2a+b)$ का मान ज्ञात कीजिए:

  • A
    $7$
  • B
    $8$
  • C
    $9$
  • D
    $10$

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