2^3.5*3^5,5/6^4,5

I interpret the expression as (2^3.5) * (3^5.5) / (6^4.5), i.e. exponents with decimal points (comma in your input equals decimal point).

Compute:

• Write exponents as halves: 2^(7/2) * 3^(11/2) / 6^(9/2)
• Since 6 = 2*3, 6^(9/2) = 2^(9/2) * 3^(9/2)
• Then: 2^(7/2)/2^(9/2) * 3^(11/2)/3^(9/2) = 2^(-1) * 3^(1) = 3/2

Answer: 3/2 (which is 1.5). If you meant something different, let me know.