Find the exact value for the expression under the given conditions. sin(α+β),cosα=73​ for α in Quadrant IV and sinβ=53​

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Find the exact value for the expression under the given conditions. sin(α+β),cosα=73​ for α in Quadrant IV and sinβ=53​ for β in Quadrant II.
Find the exact value for the expression under the given conditions. Write your answer in simplest form. Rationalize the denominator, if necessary, tan(α+β);cosα=−257​ for α in Quadrant III and sinβ=−6563​ for β in Quadrant IV. tan(α+β)=