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= f(3(2x² - 2) + 1)
= f(6x² - 5)
= 2(6x² - 5) - 3
= 12x² - 13
f(g(2x^2-2)
f(3(2x^2-2 +1)
f(6x^2 -3)
2(6x^2-3) -3
12x^2 - 9