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------------ . ---------
(x+4)(x+4) x-1
x+3 3x+12
------------ . -----------
(x+4)(x+4)
3x2 +12x+ 9x +36
------------------------ =
(x+4)(x+4)
3x2+21x+36
------------------=
(x+4)(x+4)
(3x+9)(x+4) 3x+9
---------------- = ---------//
(x+4)(x+4) x+4