Trigonometric function: TrigReduce, TrigExpand, TrigFactor, TrigToExp.
Symbolic tensors operations: Inner, Outer, Dot, TensorProduct, TensorTranspose, TensorContract, TensorExpand, TensorReduce, TensorWedge, KroneckerProduct.
Basic functions: Total, MapThread, Level.
Functions from Mathematica tutorial: TreeForm, Manipulate, FinFunction, GeoElevationData, Apply, Plus, MatrixForm, Sequence, Attribures, SetAttributes, Listable, Clear, ClearAll, Remove, NestList, NestWhileList, Table, ComplexPlot, I, Re, Im, ReIm, Abs, Arg, AbsArg, Plot3D, BoxRations, ContourPlot, Contours, Show, Graphics, Point, NSolve, Flatten, ListDensityPlot, DensityPlot3D.
Syntactical things: Function, Sequence, Association, Apply, Map, Operate, Slot, Placeholder, Through.
Mathematica special characters and shorthand notations.
(* Generate matrix *)
Array[Subscript[a,##]&,{2,3}] // MatrixFormFunction: Apply.
Apply[#1^#2&, {2,3}]
(* vagy *)
#1^#2&/@@{2,3}
Function Flatten is equivalent with Matlab's A(:),
Function Array is equivalent with Matlab's linspace.