(
    (def A 10)
    (def FOO (=add A (sub 10 5)))

    ; FOO is 15

    (ld r0 (=add 14 1))
    (cmp r0 15 (ne? (fault "1")))

    (ld r0 (=add FOO 1))
    (cmp r0 16 (ne? (fault "2")))

    (ld r0 (=add (sub FOO 2) 3))
    (cmp r0 16 (ne? (fault "3")))
)