Question

please answer me please​

Answer 1

Answer:

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Answer 2

$13 {x}^{3} - 12 {y}^{2} + 6 {x}^{2} - 8 {y}^{2}$

$\orange{ \therefore13 {x}^{3} + 6 {x}^{2} - 20 {y}^{2} }$

HOPE IT HELPS!!