Question

$(m {}^{2} - n { }^{2}m) { }^{2} + 2m {}^{3}n {}^{2}$
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Answer 1

Step-by-step explanation:

$( {m}^{2} - {n}^{2} m)^{2} + 2 {m}^{3} {n}^{2} \\ \\ {m}^{4} + {n}^{4} {m}^{2} - 2 {m}^{3} {n}^{2} + 2 {m}^{3} {n}^{2} \\ \\ {m}^{4} + {m}^{2} {n}^{4}$