Function negate

src/compute-engine/rubi/normal-form.ts:246–251

(ce: ComputeEngine, e: Expression)

}

function negate(ce: ComputeEngine, e: Expression): Expression {
  if (isNumber(e)) return e.neg().evaluate();
  if (e.operator === 'Multiply' && e.ops && isNumber(e.ops[0]))
    return ce._fn('Multiply', [e.ops[0].neg().evaluate(), ...e.ops.slice(1)]);
  return ce._fn('Multiply', [ce.NegativeOne, e]);
}