N262 1,2 помогите срочно нужно
1) 1/(a+2)-a/(a²-2a+4)-12/(a³+8) = (a²-2a+4-a²-2a-12)/(a³+8) = -4(a+2)/(a³+8) = -4/(a²-2a+4) 2) 2/(4a+2)-1/(2a-1)-(3-2a)/(1-4a²) = 1/(2a+1)-1/(2a-1)+(3-2a)/(4a²-1) = (2a-1-2a-1+3-2a)/(4a²-1) = (1-2a)/(4a²-1) = -1/(2a+1) Ûßö...=)