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If x% y=y^(2)-x^(2),x$ y=x-:y^(2),x#y=2x...

If `x% y=y^(2)-x^(2),x$ y=x-:y^(2),x#y=2xy`, then value of `{(13%5)$6}#15` is

A

480

B

720

C

`-360`

D

`-120`

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