5+7$ 6^2+1$ 3*8+6$ 5^4-6^4$ 5-3*7/4-9$ 8*(9/3-2)/4+5*6$ 5^3*4+(2+(9*8/(2*6*(/4)))^2*8-5)/5^2-4$ 5-3*8/2^3$ 3^3^2*3$ 8*(6/3-2)/4+5*6+3$