Subtract the following: \[\mathbf{3}{{\mathbf{x}}^{\mathbf{2}}}\mathbf{+ 13}{{\mathbf{y}}^{\mathbf{2}}}\] from \[\mathbf{3}{{\mathbf{x}}^{\mathbf{2}}}-\mathbf{5}{{\mathbf{y}}^{\mathbf{2}}}\] from \[\mathbf{3}{{\mathbf{x}}^{\mathbf{2}}}-\mathbf{5}{{\mathbf{y}}^{\mathbf{2}}}\]

• A. 18y2 
• B.  -18y2
• C.  \[8{{y}^{2}}+\text{ }6{{x}^{2}}\]
• D.  \[7{{x}^{2}}-8{{y}^{2}}\]
• E. None of these