Prove using multiple formula
cos 70 - cos 10 + cos 50 = 0

My favorite songstress gives away 25% of this side of her signature fragrance collection to her charity last month her sales were 1200 how much of her sales did she donate

John bought 5 lemons and used 2 of them for a salad how much did he use for. a salad . he used % of the lemons.

Which expression is equivalent to 3^3 + 2^2?