Answer :

Certainly! Let's simplify the given expression step by step.

### Expression to Simplify

[tex]\[ \frac{\left(x^1 y^{2 / 7}\right)^3}{x^{2 / 5} y^{5 / 7}} \][/tex]

### Step 1: Simplify the Numerator

First, let's focus on the numerator [tex]\(\left(x^1 y^{2 / 7}\right)^3\)[/tex]. We need to apply the power rule, which states that [tex]\((a^m)^n = a^{m \cdot n}\)[/tex].

#### Simplify [tex]\(x\)[/tex]-term in the Numerator

[tex]\[ (x^1)^3 = x^{1 \cdot 3} = x^3 \][/tex]

#### Simplify [tex]\(y\)[/tex]-term in the Numerator

[tex]\[ \left(y^{2 / 7}\right)^3 = y^{(2/7) \cdot 3} = y^{6/7} \][/tex]

Thus, the numerator simplifies to:

[tex]\[ x^3 y^{6 / 7} \][/tex]

### Step 2: Combine Numerator and Denominator

Now, rewrite the entire expression using the simplified numerator:

[tex]\[ \frac{x^3 y^{6 / 7}}{x^{2 / 5} y^{5 / 7}} \][/tex]

### Step 3: Apply Properties of Exponents

To further simplify, we need to apply the properties of exponents, which state that [tex]\(\frac{a^m}{a^n} = a^{m-n}\)[/tex].

#### Simplify [tex]\(x\)[/tex]-terms

[tex]\[ \frac{x^3}{x^{2 / 5}} = x^{3 - 2/5} \][/tex]

Calculate the exponent for [tex]\(x\)[/tex]:

[tex]\[ 3 - \frac{2}{5} = 3 - 0.4 = 2.6 \][/tex]

#### Simplify [tex]\(y\)[/tex]-terms

[tex]\[ \frac{y^{6 / 7}}{y^{5 / 7}} = y^{(6 / 7) - (5 / 7)} \][/tex]

Calculate the exponent for [tex]\(y\)[/tex]:

[tex]\[ \frac{6}{7} - \frac{5}{7} = \frac{1}{7} \approx 0.1428571428571428 \][/tex]

### Final Simplified Expression

Combining these results, the simplified form of the given expression is:

[tex]\[ x^{2.6} y^{0.1428571428571428} \][/tex]

Thus, the fully simplified expression is:

[tex]\[ x^{2.6} y^{0.1428571428571428} \][/tex]