[tex]A) {{(2x-6)^{2} } \atop {x-3} ight. C) {{4x^{2} -4} \atop {(2x-2){^{2} } } ight. B) { {{a^{5}+a^{3} } \atop {a^{4} }a^{2} } ight. D) { {{y^{7}-y^{4} } \atop {y^{2} -y^{5} }} ight.[/tex]

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