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Simplifying Equations and Solving Functions

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1. Simplify: (-5a^3b^2)^4 a^12b^5/b^-7
2. let f(x)=3x^2 and g(x)=x-4
-Find the composite function (f o g)(x) and simplify
-Find (f o g)(-1)
3. Find the exact solutions and simplify as much as possible 4x^2+5=4x

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