Find the coefficient of `x^4` in the expansion of `(x//2-3//x^2)^(10)dot`

Explanation

To find the coefficient of \( x^4 \) in the expansion of \( \left( \frac{x}{2} - \frac{3}{x^2} \right)^{10} \), we will use the Binomial Theorem.

### Step-by-Step Solution:

1. **Identify the Terms**:
We have \( a = \frac{x}{2} \) and \( b = -\frac{3}{x^2} \). The exponent \( n = 10 \).

2. **General Term**:
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