10% + 25% + 25% + 0.1% + 49.9% = 110% 
Anyway on topic, I would say your best bet (for the first bit) would be to input bits of it into a calculator and just write out the results in steps until you finally get to the answer. For the 2nd, find the common numbers that appear on the top and the bottom then remove them from there and times the divide by them afterwards. The last section should just be plugging into a calculator (maybe find a Trigonometry calculator) and hope for the best.
By reading this signature you agree that mixster is superior to you in each and every way except the bad ways but including the really bad ways.