Identify monomials, binomials and trinomials from the following expression:
(i) -3xyz (ii) `4x^(2) yz + 9 - 5x^(3)` (iii) -7
(iv) `x^(2) + y^(2) + z^(2) - p^(2)` (v) x + 5 (vi) `6a^(3) b`

Explanation

To identify monomials, binomials, and trinomials from the given expressions, we will analyze each expression step by step.

### Step-by-Step Solution:

1. **Expression (i): -3xyz**
- This expression consists of only one term.
- **Classification**: Monomial

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