plot y=-x ;y=0;y=-(1/64)x^4+(1/4)x^2-(1/2)x+1/4 for -2.5<x<2.5plot y=-x ;y=0;y=-(1/64)x^4+(1/4)x^2-(1/2)x+1/4 for -2.5<x<2.5

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