0.7*13/11-4.4*3/7-3.3/ 7/3+0.7*9/11
=0.7*13/11+0.7*9/11-(4.4*3/7+3.3*3/7)
=0.7*(13+9)/11-(4.4+3.3)*3/7
=0.7*2-1.1*3
=1.4-3.3
=-1.9