Выполните действия.

• Объекты 1
  • \(\frac{17}{21}-(\frac{14}{21}-\frac{9}{21})\)
  • \(\frac{17}{21}-(\frac{13}{21}-\frac{9}{21})\)
  • \(\frac{17}{21}-(\frac{4}{21}+\frac{9}{21})\)
  • \(\frac{7}{21}+(\frac{17}{21}-\frac{9}{21})\)
• Объекты 2
  • \(\frac{12}{21}\)
  • \(\frac{13}{21}\)
  • \(\frac4{21}\)
  • \(\frac{15}{21}\)