2) 8(у²-6у+9)+15+40у-3у-8у²>2

8у²-48у+72+15+40у-3у-8у²>2

-11у+87>2

-11у>2-87

-11у>-85

у<85/11

4) 49z²-2z+1/49-(49z²-24.5z+22z-11)>0

49z²-2z+1/49-(49z²-2.5z-11)>0

49z²-2z+1/49-49z²+2.5z+11>0

0.5z+540/49>0

0.5z>-540/49

z>-1080/49