Question 1043159
{{{f(x)=3x-1}}}
{{{g(x)=4x^2}}}
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{{{f(g)=3g-1=3(4x^2)-1=12x^2-1}}}
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{{{g(f)=4f^2=4(3x-1)^2=4(9x^2-6x+1)=36x^2-24x+4}}}