More updates on verification of the explicit formula, I copied the formula from Anvil to Canvas and created a formula question. Using the same inputs/values, I get exactly the same answer. This verifies, at least in theory, the technique works. Recall from my previous post the answer was 6.25, and the Canvas answer is also 6.25. So 3 different ways to verify the answer: (1) Google sheets with formulas in many cells (2) Google sheets with a single formula created by tracking (3) Canvas. The Canvas interface is shown below: