If the signs – and ÷ are interchanged, then which of the following equations would be correct?

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 31 * 29 * 43 * 85 * 5

Which two signs should be interchanged to make the given equation correct?
 48 ÷ 12 × 3 + 5 − 4 = 21

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 57 * 35 * 44 * 11 * 13 *74

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 16 * 4 * 8 * 10 * 2 *24

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 25 * 5 * 10 * 2 * 8 * 44

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 37 * 3 * 21 * 79 * 18 * 4 * 19

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 91 * 15 * 5 * 18 * 37