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f(x)=Piecewise[{{12x*e^((1-x^2)/4), x <= 2}, { 2x^3-18x^2+60x-40, 2 < x}}
f(x)=Piecewise[{{12x*e^((1-x^2)/4), x <= 2}, { 2x^3-18x^2+60x-40, 2 < x}}
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