=== src/utils/math.ts ===
export function add(a: number, b: number): number {
  return a + b;
}

export function subtract(a: number, b: number): number {
  return a - b;
}


=== src/utils/string.ts ===
export function capitalize(str: string): string {
  return str.charAt(0).toUpperCase() + str.slice(1);
}

export function lowercase(str: string): string {
  return str.toLowerCase();
}
