Question 93262
4d exponent 9 m exponent 6 * 10d exponent 9 m exponent 6/2d exponent 9 m exponent 9
solution:

 40d^18m^12/2d^9m^9   ( 4*10 = 40 , d^9*d^9 = d^9+9 , m^6*m^6 = m^12)

 20d^9 m^3        (20/2 = 20 , d^18/d^9 = d^18-9 = d^9, m^12/m^9 = m^12-9 =m^3)

Hence the solution