(4-(-1/9)^2-(-1/9)×(-1/9+1)
[tex](4 - ( - \frac{1}{9} ) ^{2} - ( - \frac{1}{9} ) \times ( - \frac{1}{9} + 1)[/tex]
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=16-2·4·₍⁻1/9₎+₍-1/9₎²-₍-1/9₎²+1/9=16+8/9+1/9=17