4x ²+7 x y+3y ² over 16x ²-9y ² simplify

Its simplifying rational expression
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wi dont yu make that (4x^2 +8xy+3y^2) / (16x^2-9y^2)???????,... then top=(2x+3y)*(2x+y)... & bottom=(4x-3y)*(4x+3y)... o very well, with 7xy, top=(4x+3y)*(x+y)... then top/bottom=(x+y) / (4x-3y)
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