\left. \begin{array} { l } { ( a ^ { 3 } - b ^ { 4 } ) ( a ^ { 3 } + b ^ { 4 } ) } \\ { ( 10 x ^ { 3 } y - \frac { 1 } { 9 } x y ^ { 2 } ) ( 10 x ^ { 3 } y + \frac { 1 } { 9 } x y ^ { 2 } ) } \\ { ( 4 x - 3 y ) ( 4 x + 3 y ) + ( 3 x + 4 y ) ( 4 y - 3 x ) } \\ { ( y - 3 ) ( 5 - y ) - ( 4 - y ) ( y + 4 ) } \end{array} \right.
Least Common Multiple
\frac{7\left(xy\right)^{2}\left(251100x^{6}b^{8}+8x^{2}y^{3}b^{8}-8x^{2}y^{3}a^{6}+8y^{5}b^{8}-8y^{5}a^{6}-31y^{4}b^{8}+31y^{4}a^{6}-64800y^{3}x^{4}b^{8}+64800y^{3}x^{4}a^{6}+251100y^{2}x^{4}b^{8}-251100y^{2}x^{4}a^{6}-64800yx^{6}b^{8}+64800y\left(ax\right)^{6}-251100\left(ax\right)^{6}-31\left(xy\right)^{2}b^{8}+31a^{6}\left(xy\right)^{2}\right)}{81}
Evaluate
a^{6}-b^{8},\ \frac{\left(8100x^{4}-y^{2}\right)\left(xy\right)^{2}}{81},\ 7\left(x^{2}+y^{2}\right),\ 8y-31
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