Function cofunctionShift

src/compute-engine/rubi/rubi-utils.ts:2560–2570

(
  ce: ComputeEngine,
  e: Expression,
  x: string
)

]);
const CALCULUS_FNS = new Set([
  'Integrate',
  'D',
  'Derivative',
  'Sum',
  'Product',
  'Limit',
]);
function inverseFunctionFreeQ(u: Expression, x: string): boolean {
  const op = u.operator;
  if (
    INVERSE_FNS.has(op) ||
    CALCULUS_FNS.has(op) ||
    op === 'Hypergeometric2F1' ||
    op === 'AppellF1'