- $\dfrac{{{a}^{3}{+}{b}^{3}}}{{{a}^{3}{+}{c}^{3}}}{=}\dfrac{{{a}{+}{b}}}{{{a}{+}{c}}}$
- $\dfrac{{{a}^{3}{+}{b}^{3}}}{{{a}^{3}{+}{c}^{3}}}{=}\dfrac{{{a}{+}{c}}}{{{a}{+}{b}}}$
- $\dfrac{{{a}^{3}{+}{b}^{3}}}{{{a}^{3}{+}{c}^{3}}}{=}\dfrac{{{b}{+}{c}}}{{{a}{+}{b}}}$
- $\dfrac{{{a}^{3}{+}{b}^{3}}}{{{a}^{3}{+}{c}^{3}}}{=}\dfrac{{{b}{+}{c}}}{{{a}{+}{c}}}$