## Math Problem Statement

Find the middle term in the expanssion of (3x-x^3/6)^7

## Solution

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## Math Problem Analysis

### Mathematical Concepts

Algebra

Binomial Expansion

Exponentiation

### Formulas

Binomial expansion formula: (a + b)^n = Σ (n choose k) a^(n-k) b^k

Combination formula: n choose k = n! / (k!(n-k)!)

### Theorems

Binomial Theorem

### Suitable Grade Level

Grades 11-12