Ответ:

3) m+2/4m²-16m+16-1/3m-6

m+2/4(m²-4m+4)-1/3(m-2)

m+2/4(m-2)²-1/3(m-2)

3(m+2)-4(m-2)/12(m-2)²

3m+6-4m+8/12(m-2)²

-m+14/12(m-2)²

4) 2a+3/a²-4a+4-5/a²-4-2a-3/a²+4a+4

2a+3/(a-2)²-5/(a-2)×(a+2)-2a-3/(a+2)²

(a+2)²×(2a+3)-5(a-2)×(a+2)-(a-2)²×(2a-3)/(a-2)²×(a+2)²

(a²+4a+4)×(2a+3)-5(a²-4)-(a²-4a+4)×(2a-3)/((a-2)×(a+2))²

2a³+3a²+8a²+12a+8a+12-5a²+20-(2a³-3a²-8a²+12a+8a+12)/(a²-4)²

2a³+6a²+20a+32-(2a³-11a²+20a-12)/(a²-4)²

2a³+6a²+20a+32-2a³+11a²-20a+12/(a²-4)²

17a²+44/(a²-4)²