Спростіть вираз 3//(9-m^2)+(2m-1)//(m-3)-(m^2-4)//(m^2+6m+9)

3/(3-m)(3+m)-(2m-1)/(3-m)-(m²-4)/(3+m)²= =(27+3m-2m³-12m²-18m+m²+6m+9-3m²+m³+12-4m)/(3-m)(3+m)²= =(-m³-14m²+5m+48)/(3-m)(3+m)²