foo.c: In function 'main':
foo.c:6:51: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
    6 |         printf("%lld", (a11 * a22 - a12 * a21)%(10^9+7);
      |                                                   ^
foo.c:6:56: error: expected ')' before ';' token
    6 |         printf("%lld", (a11 * a22 - a12 * a21)%(10^9+7);
      |               ~                                        ^
      |                                                        )
foo.c:8:18: error: expected ';' before '}' token
    8 |         return 0;
      |                  ^
      |                  ;
    9 | }
      | ~                 

[Hydro](https://hydro.ac)提供评测服务