Multiply $\frac{\left(x^{a}\right)^{2}}{\left(x^{b}\right)^{2}}$ times $\frac{\left(x^{b}\right)^{2}}{\left(x^{c}\right)^{2}}$ by multiplying numerator times numerator and denominator times denominator.
Multiply $\frac{\left(x^{a}\right)^{2}}{\left(x^{c}\right)^{2}}$ times $\frac{\left(x^{c}\right)^{2}}{\left(x^{a}\right)^{2}}$ by multiplying numerator times numerator and denominator times denominator.