# Khan/khan-exercises

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 New operator definitions 1
randRange(3, 8) randRange(2, 4) randFromArray([ function(x, y) { return ["+", ["*", C, x], y]; }, function(x, y) { return ["-", ["*", C, x], y]; }, function(x, y) { return ["+", x, ["*", C, y]]; }, function(x, y) { return ["-", x, ["*", C, y]]; }, function(x, y) { return ["-", ["*", C, x], ["*", D, y]]; }, function(x, y) { return ["-", ["*", D, x], ["*", C, y]]; }, function(x, y) { return ["*", x, ["-", y, C]]; }, function(x, y) { return ["*", ["-", C, x], y]; }, function(x, y) { return ["+", ["^", x, 2], ["*", D, ["^", y, 2]]]; }, function(x, y) { return ["+", ["*", D, ["^", x, 2]], ["^", y, 2]]; }, function(x, y) { return ["-", ["^", x, 2], ["*", D, ["^", y, 2]]]; }, function(x, y) { return ["-", ["*", D, ["^", x, 2]], ["^", y, 2]]; }, function(x, y) { return ["-", ["*", D, x], C]; }, function(x, y) { return ["+", ["*", C, y], D]; }, function(x, y) { return ["+", ["*", x, y], ["*", D, x], ["-", y]]; } ]) randRange(-6, 6) randRange(-6, 6) expr(FUN("x", "y")) expr(FUN(X, Y)) expr(FUN(X, Y), true) !isNaN(expr(FUN(0, NaN), true)) !isNaN(expr(FUN(NaN, 0), true))

If x binop(1) y = TEXT, find X binop(1) Y.

VALU

Substitute in x = X y = Y x = X and y = Y to get SUBS.

Simplify the expression to get VALU.