Evaluate each of the following indefinite integrals using substitution, expressing your final answer in terms of
r
. (a)
\int x^(2)sin(x^(3))dx
(b)
\int x\sqrt(4x 1)dx
(c)
\int (x)/(x^(2) 1)dx
(d)
\int (1)/(xlnx)dx
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