(-m2+6)+(-4m2+7m+2)

Remove parentheses.

-m2+6-4m2+7m+2

Subtract 4m2 from -m2.

-5m2+6+7m+2

Add 6 and 2.

-5m2+7m+8

Add (-m^2+6)+(-4m^2+7m+2)

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# Add (-m^2+6)+(-4m^2+7m+2)

(-m2+6)+(-4m2+7m+2)

Remove parentheses.

-m2+6-4m2+7m+2

Subtract 4m2 from -m2.

-5m2+6+7m+2

Add 6 and 2.

-5m2+7m+8

Add (-m^2+6)+(-4m^2+7m+2)