Input:
integrate(tan(x), x, 0, pi/2)
Write:
`integrate(tan(x), x, 0, pi/2)`
Output: $$ integrate(tan(x),x,0,\frac{1}{2}\ \pi ) == (-log(cos(\frac{1}{2}\ \pi ))) $$ Result: $$(-log(cos(\frac{1}{2}\ \pi )))$$
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