Formula Error - Don't Know What the Error Is

Can someone please tell me what is wrong with this formula based on the information below it? I copied it exactly as was posted online and got an error message (with no explanation as to what the error is). This formula is supposed to figure out one of the "Greek" values for calculating call/put option prices and the answer to this particular formula is supposed to be 0.59730.

=(LN((B3\EXP(-B8\B7))/B4)+((B6+((B5)^2)/2)\B7))/((B5)\SQRT(B7))

B2 -30-Jun-18
B3 - 550
B4 - 500
B5 - 25%
B6 - 1%
B7 - 0.504
B8 - 2%
B9 - 1200
B10 -31-Dec-18
B11 - 11


Thanks in advance