Start with:
Change it to:

(((x*x)+(3*x))+(3*x))
(((x*x)+(3*x))+(3*x))

CURRENT:	( + ( + ( * x x ) ( * 3 x ) ) ( * 3 x ) )
GOAL:	( - ( * ( + x 3 ) ( + x 3 ) ) ( * 3 3 ) )

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