`c) 3/8 + \frac{-14}{6}`
`= 9/24 + \frac{-56}{24}`
`= -47/24`
`d) 350/150 + \frac{-200}{360}`
`= 7/3 + \frac{-5}{9}`
`= 21/9 + \frac{-5}{9}`
`= 16/9`
`f) 7/3 + [(-5/6) + (-2/3)]`
`= 7/3 + (-5/6) + (-2/3)`
`= 14/6 + (-5/6) + (-4/6)`
`= \frac{14 + (-5) + (-4)}{6}`
`= 5/6`
`c) (-15/12 + 3/-4) + 15/12`
`= (- 5/4 + -3/4) + 5/4`
`= -8/4 + 5/4`
`=-3/4`