垄断厂商短期均衡

def solve(____):
    a, b = demand_func
    fc, c, d = cost_func
    q_opt = (____) / (____ * (____))
    p_opt = a - b * q_opt
    tr = p_opt * q_opt
    tc = fc + c * q_opt + d * q_opt ** ____
    profit = tr - tc
    return {"____": round(____), "____": round(____), "____": round(____), "____": round(____), "____": round(____)}