When 37 g of ca(oh)2 is added to 1000 ml of 0.55M h2so4 .the resulting poh is ?

You're doing a little better with caps but note that Co, CO, and co all mean something different; therefore, use caps for formulas.

Ca(OH)2 + H2SO4 ==> 2H2O + CaSO4.

mols Ca(OH)2 = grams/molar mass = ?
mols H2SO4 = M x L = ?
The difference in mols is the excess reagent and convert to pOH.