$Assumptions is the default setting for the Assumptions option used in such functions as Simplify, Refine, and Integrate.

RegionPlot[pred, {x, x_min, x_max}, {y, y_min, y_max}] makes a plot showing the region in which pred is True.

EvaluationMonitor is an option for various numerical computation and plotting functions that gives an expression to evaluate whenever functions derived from the input are ...

InterpolatingPolynomial[{f_1, f_2, ...}, x] constructs an interpolating polynomial in x which reproduces the function values f_i at successive integer values 1, 2, ... of x. ...

NExpectation[expr, x \[Distributed] dist] gives the numerical expectation of expr under the assumption that x follows the probability distribution dist.NExpectation[expr, ...

The functionality of NumericalMath`ListIntegrate` is now accessible by using the built-in Mathematica kernel functions Integrate and Interpolation.

"AddFrame" is a front end token that adds a frame around the current selection.

"DeleteNext" is a front end token that deletes the character to the right of the insertion point.

"DeleteNextWord" is a front end token that deletes the word to the right of the insertion point.

"DeletePrevious" is a front end token that deletes the character to the left of the insertion point.