That is the equation for photosynthesis for plants. Aswell as sunlight, plants also need chlorophyll to photosynthesise.
This is how plants photosythesise: The process of photosynthesis is when plants use water and carbon dioxide to create their food, grow, and release excess oxygen into the air. Photosynthesis uses sunlight, carbon dioxide and water to produce oxygen, glucose and water.
What is respiring? Respiring is breathing. Like animals plants also breathe. All living organisms, including plants, receive their energy required for their survival from a chain of chemical reactions called respiration. So yes, plants do respire.