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If |[e^x, sin x, 1],[ cos x ,log(e)(1+x^...

If `|[e^x, sin x, 1],[ cos x ,log_(e)(1+x^(2)), 1],[ x, x^(2), 1]| =a+bx+cx^(2)` then `(a+b)^(2)` is equal to

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