Final answer:
Without additional information on Quantity B, it is impossible to compare it to Quantity A and determine which is greater or if they are equal.
Step-by-step explanation:
The student is asking to compare two quantities, Quantity A (1-x)/(1+x^2) and Quantity B, which is not specified in the question. Since we don't have information about Quantity B, we cannot definitively compare it to Quantity A. Without additional context or information, the relationship between the quantities cannot be determined. In mathematics, especially when dealing with comparisons, specific values or expressions are necessary to determine relationships such as equality or inequality.