Calculate delta H_rxn for the following reaction:?

Calculate delta H_rxn for the following reaction:
CaO(s) + CO2(g) --> CaCO3(s)

Use the following reactions and given .
Ca(s) + CO2(g)+ 1/2 O2 (g) --> CaCO3(s), delta H =-812.8 kJ
2Ca(s) + O2 (g) ---> 2CaO(s), delta H = -1269.8 kJ

Express your answer using four significant figures.
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