Using the order of operations, what should be done first to evaluate 6+(-5-7) -8(3) over 2

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

Could you make it more clear?

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