\left. \begin{array} { l } { ( - a ^ { 2 } + \frac { 1 } { 2 } b ) ( - a ^ { 2 } - \frac { 1 } { 2 } b ) + \frac { 17 } { 4 } b ^ { 2 } ( a ^ { 2 } - 2 b ) ( a ^ { 2 } + 2 b ) + ( - 2 b ) ^ { 4 } } \\ { ( 2 x - 5 y - 4 ) ( 8 x - 2 y + 1 ) - ( 2 - 4 x ) ( - 2 - 4 x ) - 10 ( - 4 x y - 3 x + y ^ { 2 } ) } \end{array} \right.
Least Common Multiple
\frac{y\left(4x-3\right)\left(b^{2}-4a^{4}+4b^{4}-17b^{2}a^{4}\right)}{4}
Evaluate
\frac{17b^{2}a^{4}}{4}+a^{4}-b^{4}-\frac{b^{2}}{4},\ 3y-4xy
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