(8 m²n² + 3mn² + 5) - (2m²n²-3mn² + 3)
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6m²n²+6mn²+2
Step-by-step explanation:
(8m²n²+3mn²+5)-(2m²n²-3mn²+3)
=8m²n²+3mn²+5-2m²n²+3mn²-3
=8m²n²-2m²n²+3mn²+3mn²+5-3
=6m²n²+6mn²+(5-3)
=6m²n²+6mn²+2