- ∫2^-x dx please help me to solve this integral?

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Differentiate(t) = (cos^3 t+ 3cost +7)^9? I'm trying to find a compound that contains an alkaline earth metal and a polytomic ion and then finding its molar mass.? I need news on the tremors/aftershocks/earthquake I am feeling in Maricopa county Arizona.? Which pattern of speciation is most important in nature? Allopatric or sympatric why? Help me to solve the following question!
Find integers x and y such that 57x+79y=17, and 400