n(45deg )');
test_invalid_angle('atan(30deg, + 0.261799rad)');
test_invalid_angle('atan2()');
test_invalid_angle('atan2( )');
test_invalid_angle('atan2(,)');
test_invalid_angle('atan2(1dag)');
test_invalid_angle('atan2(1deg, )');
test_invalid_angle('atan2(, 1deg)');
test_invalid_angle('atan2(1deg + )');
test_invalid_angle('atan2(1deg - )');
test_invalid_angle('atan2(1deg * )');
test_invalid_angle('atan2(1deg / )');
test_invalid_angle('atan2(1deg 2deg)');
test_invalid_angle('atan2(1deg, , 2deg)');
test_inval