Select the simplified form of this expression $$ \frac{1}{7} x^{2}(x-7) $$

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Calculate or simplify the expression $$ \frac{1}{7}x^{2}(x-7) $$.
Simplify the expression by following steps:
- step0: Solution:
  $$\frac{1}{7}x^{2}\left(x-7ight)$$
- step1: Rewrite the expression:
  $$7^{-1}\left(x-7ight)x^{2}$$
- step2: Multiply the expression:
  $$\frac{1}{7}\left(x-7ight)x^{2}$$
- step3: Rearrange the terms:
  $$\left(x-7ight)	imes \frac{1}{7}x^{2}$$
- step4: Apply the distributive property:
  $$x	imes \frac{1}{7}x^{2}-7	imes \frac{1}{7}x^{2}$$
- step5: Multiply the terms:
  $$\frac{1}{7}x^{3}-x^{2}$$
The simplified form of the expression $$\frac{1}{7} x^{2}(x-7)$$ is $$\frac{1}{7}x^{3}-x^{2}$$.
The simplified form is $$ \frac{1}{7}x^{3} - x^{2} $$.

Select the simplified form of this expression

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