`4)`
`[1/3+1/9:(-1/3)^3]. 15/32`
`=[1/3+1/9:(-1/27)]. 15/32`
`=[1/3+1/9. (-27)]. 15/32`
`=[1/3+(-3)]. 15/32`
`=[1/3+(-9/3)]. 15/32`
`=-8/3. 15/32`
`=-5/4`
___________________________________________
`5)`
`2^3+3.(-1/2)^2-2^2. 4+[(-2)^2:1/2].8`
`=8+3. 1/4-4.4+[4:1/2].8`
`=8+3/4-16+[4. 2].8`
`=8+3/4-16+8.8`
`=8+3/4-16+64`
`=(8-16+64)+3/4`
`=56+3/4`
`=224/4+3/4`
`=227/4`