Respuesta :

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simplify step-by-step
[tex]5 {x}^{7} + 7 {x}^{8} - (4 {x}^{4} - 2 {x}^{8} )[/tex]
ANSWER
[tex]9 {x}^{8} + 5 {x}^{7} - 4 {x}^{4} [/tex]