31•3-56= 4•17+32= 90-65:5= 84:7+27

Here are the results, with standard order of operations (multiplication/division before addition/subtraction):

• 31•3−56 = 93 − 56 = 37
• 4•17+32 = 68 + 32 = 100
• 90−65:5 = 90 − (65 ÷ 5) = 90 − 13 = 77
• 84:7+27 = (84 ÷ 7) + 27 = 12 + 27 = 39