∵AB=BE,∴∠AEB=∠BAE,∵AB∥CD,∴∠BAE=∠F,∵∠AEB=∠CEF,∴∠CEF=∠F,∴∠CEF=52°,∵AD∥BC,∴∠DAF=52°,∴∠D=180°-2×52°=76°,故答案为76°.