o+0 5m_ 3m; e) a+2b -a - 4b ; 2c 2c 2) a) 4y -1 .2y -7 5y a- 8 13 + a - 25 a2 -25 3c 10+ c Д) 2- 5c ả- 5c 6) 응-용; 3 B） ≤+3x； y д) x+ Ay + 2x + 5y; *) -4c+ 4c+3d + 3d-c; 3у - 1 Бу…

It seems that you have pasted a series of expressions and equations, perhaps related to algebra or calculus. However, the formatting is a bit unclear, and it's difficult to determine exactly what you're asking.

If you could clarify what you need help with, such as simplifying a specific expression, solving an equation, or understanding a concept, I would be happy to assist you! Please provide a bit more detail or context.