# Double Integrals

The integration of a function of two variables is called iterated integration. The following is an example of a double integral: \[\int_3^6 \int_{-1}^2 10xy^2 dxdy\] Because integrals can be thought of as “undoing” differentiation, the double integral can be interpreted as undoing a second partial derivative of a function. from sympy.abc import x, y from sympy import * expr = 10 * x * y**2 integrate(expr, (x, -1, 2), (y, 3, 6)) ## 945