Упрости: \({\left[{{\left( {\frac{x}{3}} \right)}^{15}} \cdot {\left( {\frac{x}{3}} \right)}^{6}:{\left( {\frac{x}{3}} \right)}^{21} - {\frac{x}{3}}\right]}^{2}\).

Выбери правильные варианты ответа:

• \(-\frac{x^2}{9}\)
• \(1-\frac{x^2}{9}\)
• \(1-\frac{1}{9}x^2\)
• \(\frac{x^2}{9}\)
• \(-\frac{1}{9}x^2\)