`a, 3/7 + 2/5 - 4/35`
`= 29/35 - 4/35`
`= 5/7`
________________
`b, 10/7 . (3/4 - 2/5) + 1/2`
`= 10/7 . 7/20 + 1/2`
`= 1/2 + 1/2`
`= 1`
___________________
`c, (1/2 + 1/3) . 8/3 + (1/24 - 1/2) . 8/3`
`= 8/3 . [(1/2 + 1/3) + (1/24 - 1/2)]`
`= 8/3 . [1/2 + 1/3 + 1/24 - 1/2]`
`= 8/3 . [(1/2 - 1/2) + (1/3 + 1/24)]`
`= 8/3 . [0 + 3/8]`
`= 8/3 . 3/8`
`= 1`
__________________
`d, (-1/4)^{2} + |-3/10| . 5/2 - 1/8`
`= 1/16 + 3/10 . 5/2 - 1/8`
`= 1/16 + 3/4 - 1/8`
`= 13/16 - 1/8`
`= 11/16`
$\text{#Apples}$
