Solution - Simplification or other simple results

Step  1  :

 1.1     10 = 2•5

(10)¹ = (2•5)¹ = 2 • 5

Equation at the end of step  1  :

  0 -  (3 • (2•5))

Step  2  :

Equation at the end of step  2  :

  0 -  (3•2•5)

Step  3  :

Final result :

  ( -3•2•5)