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Express 9 3/8 as improper fraction? What's the first digit of Pi? For what values of k is the following integral improper? upper bound is k, lower bound is 0. (x)/(x^2-19x+90)dx? A water supply reservoir has leakage, which kind of glue is effective for it? Which better: AUTOCAD 3D or AUTODESK INVENTOR ?
For design/ drawing: pipeline, baseline/ metal frame, and pumps..?