Question 555605
={{{2/3-4/5-(-11/15)+7/10-5/2}}}
={{{2/3-4/5+11/15+7/10-5/2}}}

Take LCD of 3,5,15,10,2

={{{((2)(10)-(4)(6)+(11)(2)+(7)(3)-(5)(15))/30}}}
={{{(20-24+22+21-75)/30}}}
={{{(63-99)/30}}}
={{{-36/30}}}
={{{cross(-36)/cross(30)}}}
={{{-6/5}}}