`a) (44.52.60):(11.13.15)`
`= (44.52.60):11:13:15`
`=(44:11)(52:13)(60:15)`
`=4.4.4`
`=64`
`b) 2016.20152015- 2015.20162016`
`= 2016. (2015.10001)- 2015.20162016`
`=(2016.10001).2015-2015.20162016`
`=20162016.2015-2015.20162016`
`=0`
`c) 46.37+ 46.63+ 54.267- 54.167`
`=(46.37+46.63)+(54.267-54.167)`
`=46(37+63)+54(267-167)`
`=46.100+54.100`
`=100(46+54)`
`=100.100`
`=10000`
`d) 3^6 : 3^3 - 2^3. 2 ^2`
`= 3^3 - 2^5`
`= 27 - 32`
`= - 5`