Answer:
\[-3{{x}^{3}}{{y}^{2}}+2{{x}^{2}}{{y}^{3}}\] \[\frac{-3{{x}^{3}}{{y}^{2}}-{{y}^{3}}}{\underline{-3{{x}^{3}}{{y}^{2}}-{{x}^{2}}{{y}^{3}}-5{{y}^{4}}}}\] Sum \[=-3{{x}^{3}}{{y}^{2}}-{{x}^{2}}{{y}^{3}}-5{{y}^{4}}\] Now, \[{{x}^{4}}+{{x}^{3}}{{y}^{2}}+{{x}^{2}}{{y}^{3}}+{{y}^{4}}\] \[-3{{x}^{3}}{{y}^{2}}-{{x}^{2}}{{y}^{3}}-5{{y}^{4}}\] Difference = \[\frac{\left( + \right)~~\left( + \right)~\,\,\,\,\left( + \right)}{\underline{{{x}^{4}}+4{{x}^{3}}{{y}^{2}}+2{{x}^{2}}{{y}^{3}}+6{{y}^{4}}}}\]
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