Me find the answer i’m sitting her cuz i’m lost

First of all you will have to group the like terms. Then add the exponent. So the answer is R to the power 6 and s to the power 3

“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 .