Ответ:4) \(\frac{8m^2}{4m-3} - 2m - 1 = \frac{8m^2 - (2m+1)(4m-3)}{4m-3} = \frac{8m^2 - (8m^2-6m+4m-3)}{4m-3} = \frac{8m^2-8m^2+2m+3}{4m-3} = \frac{2m+3}{4m-3}\). Итоговый ответ: \(\frac{2m+3}{4m-3}\)