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    ⁵log 3⁴. ¹/³log 2⁹/² . ²^⁰'⁵log 5
=  ---------------------------------------
       ⁵^⁰'⁵log (5².2²) - ³^⁰'⁵log 2² .

    4 ⁵log 3 .(- 9/2)(2/1) (³ log 5)
= ---------------------------------------------------------
     (1/2) 2 ⁵log 5 + (1/2) 2⁵log 2 - 1/2(2) ³log 2

    4 (- 9/2)(2/1)
= ---------------------------
    (1/2)(2)(1) + ²log 2

   - 36
= --------
   1 + 1

= - 18