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Mathematical simplification x
The original formula = (-x-1)/(x+2) ÷ (x+1)? /(x-2)(x+2)

=-(x+ 1)/(x+2)×(x-2)(x+2)/(x+ 1)?

=-(x-2)/(x+ 1)

=-(√3- 1-2)/(√3- 1+ 1)

=-(√3-3)/√3

=- 1+√3

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