$$4M4N3+10M2N5-6M3N2$$
$2\left(5M_{2}N_{5}-3M_{3}N_{2}+2M_{4}N_{3}\right)$
$$2\left(2M_{4}N_{3}+5M_{2}N_{5}-3M_{3}N_{2}\right)$$
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$10M_{2}N_{5}-6M_{3}N_{2}+4M_{4}N_{3}$