Help much appreciated and needed

Exponents properties!!!

4/x^22.5 * 5/x^2 * 2x^28.5

40x^28.5/x^24.5

40x^4

Multiply the numerators: $12x^{3 \over 2} \times 5 \times 2 \times x^{1 \over 2}\times 6x^{32} = 720x^{34}$

Multiply the denominators: $3x^{24} \times 2x^{5 \over 2} \times 3x^{7 \over 2} = 18x^{30}$

So, ${720x^{34} \over 18x^{30}} = \color{brown}\boxed{40x^4}$, just as proyaop found