Complex sentence: After his secondary education in Dax and preparatory classes at the Louis le Grand College in Paris, he pursued the diploma in mathematics, physics and highway engineering at the École nationale des ponts et chaussées in Paris and became a member of Opus Dei as a student.
Split into simpler sentences: After his secondary education in Dax and preparatory classes at the Louis le Grand College in Paris. He earned the diploma in mathematics, physics and highway engineering at the École nationale des ponts et chaussées in Paris and became a member of Opus Dei as a student.