"{\"expression\": \"safe_add(safe_exp(safe_add(safe_mul(safe_exp(safe_div(one, pi)), safe_exp(half)), safe_exp(safe_exp(one)))), safe_div(safe_sub(safe_exp(safe_div(safe_sub(safe_log(half, pi), safe_exp(half)), safe_sqrt(safe_mul(safe_div(x, safe_exp(safe_sub(one, pi))), safe_sqrt(half))))), relu(std(safe_log(x, safe_div(safe_log(y), safe_mul(x, tanh(relu(y)))))))), pi))\"}"