Resposta :
[tex]\Huge \text {$ \sf 7^{3} - 40 +18 = \dfrac {} {}$}\\\Huge \text {$ \sf 343 - 40 + 18 \dfrac {} {}$}\\\Huge \text {$ \sf 321 \dfrac {} {}$}[/tex]
[tex]\Huge \text {$ \sf 7^{3} - 40 +18 = \dfrac {} {}$}\\\Huge \text {$ \sf 343 - 40 + 18 \dfrac {} {}$}\\\Huge \text {$ \sf 321 \dfrac {} {}$}[/tex]