Ответ:

  1. \(a^{1/3}a^{1/2}=a^{5/6}\);
  2. \(b^{1/2+1/3+1/6}=b\);
  3. \(b^{1/3-1/6}=b^{1/6}\);
  4. \(a^{4/3-1/3}=a\);
  5. \(x^{1.7+2.8-2.5}=x^2\);
  6. \(y^{-3.8+2.3+1.5}=y^0=1\).

Ответ: \(a^{5/6};\ b;\ b^{1/6};\ a;\ x^2;\ 1\).