5⁶+⅞-1

To solve this expression, we will follow the order of operations, which is often remembered as PEMDAS (Parentheses, Exponents, Multiplication and Division - from left to right, Addition and Subtraction - from left to right).

Let's break down the expression step by step:

1. Exponents: 5⁶ = 5 * 5 * 5 * 5 * 5 * 5 = 15625

2. Addition and Subtraction: ⅞ - 1 = 8/8 - 1 = 1 - 1 = 0

Now we can simplify the whole expression:

5⁶ + ⅞ - 1 = 15625 + 0 - 1 = 15625 - 1 = 15624

Therefore, 5⁶ + ⅞ - 1 equals 15624.