QUESTION: Fix punctuation: In particular IX is just X It turns out that it is often useful to represent a matrix as a product with the identity matrix
ANS: In particular, IX is just X. It turns out that it is often useful to represent a matrix as a product with the identity matrix.

QUESTION: Fix punctuation: Diffuse corneal edema a severe corneal edema may be confused with anterior chamber opacity but corneal stromal connective tissue thickening keratoconus degenerative noninflammatory disorder of the eye and corneal bullae fluidfilled blister are more typically noted with diffuse corneal edema than with hypopyon or lipid flare
ANS: Diffuse corneal edema, a severe corneal edema, may be confused with anterior chamber opacity, but corneal stromal (connective tissue) thickening, keratoconus (degenerative non-inflammatory disorder of the eye), and corneal bullae (fluid-filled blister) are more typically noted with diffuse corneal edema than with hypopyon or lipid flare.

QUESTION: Fix punctuation: 1 Count the number of cards that will make a winning hand
ANS: 1. Count the number of cards that will make a winning hand.

QUESTION: Fix punctuation: 96 polyester 4 spandex
ANS:
96% polyester 4% spandex