a)
`2^{3}.19-2^{3}.14+1^2019`
`=2^3.(19-14)+1`
`=8.5-1`
`=39`
b)
`10^2-[60:(5^6:5^4-3.5)]`
`=100-[60:(5^2-15)]`
`=100-(60:10)`
`=100-6`
`=94`
c)
`160:{17+[3^{2}.5-(14+2^11:2^8)]}`
`=160:{17+[3^{2}.5-(14+2^3)]}`
`=160:{17+[3^{2}.5-(14+8)]}`
`=160:[17+(3^{2}.5-22)]`
`=160:(17+23)`
`=4`
d)
`798+100:[16-2(16-2(5^2-22)]`
`=798+100:[16-2(16-2.3)]`
`=798+100:(16-2.10)`
`=798+100:(16-20)`
`=798+100:(-4)`
`=773`