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= g(3x + 5)
= 2(3x + 5) +7/ 4(3x +5) + 1
=6x + 10 + 7/ 12x + 20 + 1
=6x + 22/ 12x + 21
(gof) - x = 6x + 22/ 12x + 21 - x/1
= -12x² - 15x + 22/ 12x + 21