前触れ: (figurative) a harbinger; a messenger; a herald

a surname

a surname / a surname

(aeronautics) leading edge

a child / (figuratively) a girl, especially a dear or desired one (compare use of English baby, babe) / a smaller or younger version of a bigger object

unary operator (operator taking one operand)

(mathematics, computing) operand

(arithmetic) arithmetic operator

to calculate

(mathematics) A procedure for generating a value from one or more other values; operation.