4000000000*250
2 1/2 - 1 7/9
1000000000000 / 250
what are the prime factors of 735
(12+7)*3+11-5*3
what are the prime factors of 70
what are the prime factors of 343
simplify 34/9
63/5 ÷ 25/21
$\sqrt{147}$ - $45^{1.65}$
