Integrate
Integrate[f,x] gives the indefinite integral ∫f dx.
Integrate[f,{x,xmin,xmax}] gives the definite integral ∫xminxmax f dx.
Integrate[f,{x,xmin,xmax},{y,ymin,ymax},…] gives the multiple integral ∫xminxmaxdx∫yminymaxdy … f.
Integrate[f,{x,y,…}∈reg] integrates over the geometric region reg.
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