Complex sentence: An important aspect of race preparation is grooming the course to provide a surface for skate-skiing and setting tracks for classic events, which takes into account snow physics, packing of snow and surface shaping and the equipment used for these functions.
Split into simpler sentences: An important aspect of race preparation is grooming the course to provide a surface for skate-skiing and setting tracks for classic events. This takes into account snow physics, methods for packing snow and surface shaping, and the equipment used for these functions.