- Integrate (x^2 - 2x)cos 2x dx ?

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Make a conjecture about the next item in the sequence.1, -4, 9, -16,? How many milliliters of concentrated of sulfuric acid (18 M) are required to make 7.0 L of 0.12M H2SO4? Solve the equation for x.
e^x = 85? Number Theory: Find the roots of 4x^2+6x+1 in Z11 (could you please explain step by step? THANKS!)? Can reality itself be programmed by interacting with it - in particular asking questions that lead to where you're directing it to go?