calculati

(5/6+3/4)×36/19+(2/3-1/6)×8/3

(1/6+7/9)×36/17+4/3(1/7-1/21)

(5/6+7/8)×36/41+16/25(3/4-5-8)×5/4

(5/12-3/18)×4/9+(4/3-1/18)×5/23​