(5a-6b)-(4a-5b)+(3a-2b)

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(5a-6b)-(4a-5b)+(3a-2b)
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(5a-6b)-(4a-5b)+(3a-2b)
(5a-6b)-(4a-5b)+(3a-2b)
 

(5a-6b)-(4a-5b)+(3a-2b)