Expression 4: "f" left parenthesis, "x" , right parenthesis equals 4 "x" cubed cosine left parenthesis, "x" to the 4th power , right parenthesisfx=4x3cosx4
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Computation of the integral:
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Expression 6: Start integral from "a" to "b" , end integral, "f" left parenthesis, "x" , right parenthesis "d" "x"∫bafxdx