Any expression multiplied by $1$ is equal to itself
Multiply the fraction by the term
Expand $\left(ca+\frac{-b}{c}\right)^2$
The power of a product is equal to the product of it's factors raised to the same power
The power of a quotient is equal to the quotient of the power of the numerator and denominator: $\displaystyle\left(\frac{a}{b}\right)^n=\frac{a^n}{b^n}$
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