Multivariable Calculus App(多重积分计算)：关于这类产品小编觉得还是人脑算的比较靠谱，不过这款软件界面看上去倒是不错，具体功能有没有说的那么强大还有待考验。

官方介绍

　　多重积分计算Multivariable Calculus App是来自Wolfram Alpha的计算应用。

更新日志

　　- Evaluate any numeric expression, or substitute a value for a variable

　　- Plot 2D or 3D functions of your choice

　　- Determine the limit of a function as it approaches a specific value or values

　　- Differentiate any single or multivariable function

　　- Find the critical points and saddle points of a function

　　- Calculate the gradient of a function

　　- Identify the local extrema of a function

　　- Find the single, double, or triple integral of a function

　　- Determine the dot or cross product of two vectors

　　- Calculate the divergence or curl of a vector field