Factor
\frac{18-55ba^{2}}{30}
Evaluate
-\frac{11ba^{2}}{6}+\frac{3}{5}
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\frac{18-30a^{2}b-5a^{2}b+10a^{2}b-30a^{2}b}{30}
Factor out \frac{1}{30}.
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