The difference between GDP at market prices and GDP at factor cost is:

Gross Domestic Product at Market Prices (${\text{GDP}}_{\text{MP}}$) accounts for market valuations, which include indirect taxes levied by government bodies and exclude any product subsidies granted. The mathematical relationship is:
$${\text{GDP}}_{\text{MP}}={\text{GDP}}_{\text{FC}}+\text{Indirect Taxes}-\text{Subsidies}$$

Rearranging the expression to find the difference:

$${\text{GDP}}_{\text{MP}}-{\text{GDP}}_{\text{FC}}=\text{Indirect Taxes}-\text{Subsidies}$$

Among the provided separate components, indirect taxes represent the positive value added to factor costs to arrive at market prices.