Помогите решить; 3/2a²b-5/8a²b+1/8a²b-3/16a²b
3/2a²b-5/8a²b+1/8a²b-3/16a²b=(3/2-5/8+1/8-3/16)a²b=(3*8-5*2+1*2-3)/16a²b=13/16a²b