E = 98 x 42 - {50 x [(18 - 2^3) : 2 + 3^2]}

E=98x42-{50x[(18-2^3):2+3^2]}
F=-80-[-130-(12-4)^2]+2008^0
H=1024:2^4+140:(39+2^5)-7623:7^21