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Algebra Level 3

If 1+ax1+bx1+cx1+a1x1+b1x1+c1x1+a2x1+b2x1+c2x\left| \begin{array}{lcr}1+ax & 1+bx & 1+cx \\ 1+a_1x & 1+b_1x & 1+c_1x \\ 1+a_2x & 1+b_2x & 1+c_2x \end{array} \right| =  A0+A1x+A2x2+A3x3\ A_0 + A_1x + A_2x^2 + A_3x^3 ,

Then A0 A_0 is

NOTE: x ϵ\epsilon R\mathbb{R}

(Challenge-Solve it within 10 seconds)
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