Для y=3 1/8:
(5 2/93 1/8 + 3 1/3)-7 2/3
= ((47/9)(25/8) + 10/3)(-23/3)
= (1175/72 + 80/24)(-23/3)
= (1175/72 + 80/24)(-23/3)
= (19525/144 + 80/24)(-23/3)
= (4235/24)(-23/3)
= -33940/72
= -472.22

Для y=1.4:
(5 2/91.4 + 3 1/3)-7 2/3
= ((47/9)1.4 + 10/3)(-23/3)
= (47/91.4 + 10/3)(-23/3)
= (47/91.4 + 10/3)(-23/3)
= (47/91.4 + 10/3)(-23/3)
= (.3022 + 3.3333)(-23/3)
= .3022 + 3.3333)(-23/3)
= 3.6355*(-23/3)
= -8.68

Значение итогового выражения равно -472.22 для y=3 1/8 и -8.68 для y = 1.4.