Question

[3x^ m y^ n ]2*[-2x^ m y^ n ]^ 3​

Answer 1

$[3x^{m}y^{n} ]2*[-2x^{m} y^{n} ]=[6x^{m}y^{n} ]*[-6x^{m} y^{n} ]=-36x^{2m}y^{2n}$