`#Mon`
`a)27.75+25.27-2.3.5^2`
`=27.75+25.27-150`
`=27.100-150`
`=2700-150`
`=2550`
`b)12:{400:[500-(125+25.7)]}`
`=12:{400:(500-300)}`
`=12:(400:200)`
`=12:2`
`=6`
`c)13.17-256:16+14:7-2021^0`
`=13.17-256:16+14:7-1`
`=221-16+2-1`
`=206`
`d)2.3^2 :3+182+3.(51:17)`
`=18:3+182+3.(51:17)`
`=6+182+3.3`
`=6+182+9`
`=197`
`e)15-5^2 . 2^3 :(100.2)`
`=15-25.8:(100.2)`
`=15-25.8:100`
`=15-200:200`
`=15-1`
`=14`
`f)5^2 .2^3 -12.5+17=:17-8`
`=25.8-12.5+170:17-8`
`=200-60+10-8`
`=142`
