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\frac{16807}{243}\left(-\frac{9}{49}\right)^{3}\left(-7\right)^{2}
Calculeu \frac{3}{7} elevat a -5 per obtenir \frac{16807}{243}.
\frac{16807}{243}\left(-\frac{729}{117649}\right)\left(-7\right)^{2}
Calculeu -\frac{9}{49} elevat a 3 per obtenir -\frac{729}{117649}.
-\frac{3}{7}\left(-7\right)^{2}
Multipliqueu \frac{16807}{243} per -\frac{729}{117649} per obtenir -\frac{3}{7}.
-\frac{3}{7}\times 49
Calculeu -7 elevat a 2 per obtenir 49.
-21
Multipliqueu -\frac{3}{7} per 49 per obtenir -21.