${{48 \times \mathop {12}\nolimits^4 \times \mathop {72}\nolimits^5 } \over {\mathop {27}\nolimits^5 }} = {{\mathop 2\nolimits^4 \times 3 \times \mathop 3\nolimits^4 \times \mathop 4\nolimits^4 \times \mathop 3\nolimits^5 \times \mathop 3\nolimits^5 \times \mathop 2\nolimits^5 \times \mathop 2\nolimits^5 \times \mathop 2\nolimits^5 } \over {\mathop {\mathop 3\nolimits^3 }\nolimits^5 }} = {{\mathop 3\nolimits^{15} \times \mathop 2\nolimits^{15} \times \mathop 2\nolimits^{12} } \over {\mathop 3\nolimits^{15} }} = \mathop 2\nolimits^{27} $