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3r + 3r + 2t = 6r + 2t
(3r - 2)(3r - 2) or (3r - 2) squared.
-7p + 5r - 6p + 3r = -7p - 6p + 5r + 3r = -(7 + 6)p + (5 + 3)r = -13p + 8r
-2r(3r - 11)(3r + 11)
It simplifies to: 2s+4R