Mathematics, 18.03.2021 02:50, v4leriaaa

Simply and state any restrictions on the variables. Help please 1. m+7/m^2+4m-21
2. x^2-16/9-x•x^2+x-90/x^2+14x+40
3. 2b^2‐12b/b+5÷b-6/b+5

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Simply and state any restrictions on the variables. Help please 1. m+7/m^2+4m-21
2. x^2-16/9-x...