`c) - 4 3/8 + ( 39 3/8 - 5 7/32 )`
`= - 4 3/8 + 39 3/8 - 5 7/32`
`= - 35 - 167/32`
`= ( - 1120 )/32 - 167/32`
`= ( - 1287 )/32`
`d) 2 1/2 + 19 3/11 . 7/26 - 6 3 /11 . 7/26`
`= 5/2 + 7/26 . ( 19 3/11 - 6 3/11 )`
`= 5/2 + 7/26 . 13`
`= 5/2 + 7/2`
`= 6`