Untitled

f1(X,Y):-X>2,
	Y is sin (X).
f1 (X,Y):- X < -2,
	Y is 3*X*X .
f1 (X,Y):-X	>=(-2 ),
	x=<2,
	Y is (-2)*X .
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f11 (X,Y) :- X >2,
	Y is sin(X).

f11(X,Y):-X < -2,
	Y is 3*X*X .

f11 (X,Y):-Y is (-2)*X .

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f2(X,Y ):-X >2,!,
 	Y is sin(X).

f2(X,Y):- x	<-2, !,
	Y is 3*X*X.

f2(X,Y):-X >= -2,
	X=< 2,!,
	Y is (-2)*X.
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f21(X,Y ):-X >2,!,
 	Y is sin(X).
 

f21(X,Y):- x	<-2, !,
	Y is 3*X*X.