Answer:
\[{{\left( \frac{1}{5} \right)}^{45}}\times {{\left( \frac{1}{5} \right)}^{-60}}-{{\left( \frac{1}{5} \right)}^{28}}\times {{\left( \frac{1}{5} \right)}^{-43}}\] \[\Rightarrow \,\,\,{{\left( \frac{1}{5} \right)}^{45-60}}-{{\left( \frac{1}{5} \right)}^{28-43}}\] \[\Rightarrow \,\,\,{{\left( \frac{1}{5} \right)}^{-15}}-{{\left( \frac{1}{5} \right)}^{-15}}\] \[\Rightarrow \,\,\,{{(5)}^{15}}-{{(5)}^{15}}\] \[\Rightarrow \,\,\,0\]
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