Question 673721
{{{((y^2+y)/(3xy))((3x+3)/(y^2+2y+1))}}}
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{{{(cross(y)cross((y+1))/(cross(3)x*cross(y)))(cross(3)(x+1)/cross((y+1))(y+1))}}}
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{{{(1/x)((x+1)/(y+1))}}}
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{{{highlight_green((x+1)/x(y+1) = (x+1)/(xy+x))}}}
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