0 1 2 3 4 5 6 7 8 9 .
+ - * / ^
( ) [ ] = x y $\pi$ e
$\sqrt{}$ sin cos tan cot ln exp asin acos atan
BckSp         Clear

### $\int_a^b\left[\int_c^d f(x,y) \mathrm{d}x\right]\mathrm{d}y$

 dy dx dx dy r dr dphi r dphi dr

### $\iint_M f(x,y) \mathrm{d}x\mathrm{d}y$

Region for integration: $\leq$ $\leq$ (bounds and variable for the outside integral)
$\leq$      $\leq$    (bounds and variable for the inside integral)

### 坐标轴

ymin =   ymax =

The calculator evaluates .
Evaluate also .
Evaluate also .
Evaluate also .
Evaluate also .
Evaluate also .

(请不要反复点击，结果将在数秒钟后呈现。)
Output:htmlPDF
Output:htmlPDF
Output:htmlPDF

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