The young Macedonian pianist Simon TrpA?eski makes his Boston Symphony Orchestra debut under the baton of frequent guest conductor Rafael Frühbeck de Burgos performing Liszt’s exciting Piano Concerto No. 2, an innovative, sparkling, one-movement work. 2011 marks the bicentennial of Liszt’s birth. Two orchestral showpieces bookend the concerto. The German composer Max Reger (1873-1916) was a transitional figure between the Romantic and the modern eras, but had a strong sense of the Germanic musical tradition. His Variations and Fugue employ a theme from one of Mozart’s most beloved piano sonatas, the A major K.331. Ravel’s familiar but exotic Boléro completes the program.i>?