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4-5m-\left(4+7m^{2}\right)-2m+5n-4m^{2}
Calculate 2 to the power of 2 and get 4.
4-5m-4-7m^{2}-2m+5n-4m^{2}
To find the opposite of 4+7m^{2}, find the opposite of each term.
-5m-7m^{2}-2m+5n-4m^{2}
Subtract 4 from 4 to get 0.
-7m-7m^{2}+5n-4m^{2}
Combine -5m and -2m to get -7m.
-7m-11m^{2}+5n
Combine -7m^{2} and -4m^{2} to get -11m^{2}.
4-5m-\left(4+7m^{2}\right)-2m+5n-4m^{2}
Calculate 2 to the power of 2 and get 4.
4-5m-4-7m^{2}-2m+5n-4m^{2}
To find the opposite of 4+7m^{2}, find the opposite of each term.
-5m-7m^{2}-2m+5n-4m^{2}
Subtract 4 from 4 to get 0.
-7m-7m^{2}+5n-4m^{2}
Combine -5m and -2m to get -7m.
-7m-11m^{2}+5n
Combine -7m^{2} and -4m^{2} to get -11m^{2}.