(2 11/12-4 5/18)*(-1 2/7)-(-3/4)2 степени

Question

(2 11/12-4 5/18)*(-1 2/7)-(-3/4)2 степени

Answer 1

(2 11/12-4 5/18)*(-1 2/7)-(-3/4)²=
(2 33/36-4 10/36)*(-9/7)- 9/16=
(2 33/36 - 3 46/36)*(-9/7)- 9/16=
(- 1 13/36)*(-9/7)- 9/16=
(- 49/36)*(-9/7)- 9/16=
7/4 - 9/16=
28/16 - 9/16=
17/16= 1 1/16