Error occurs when multiplying function's results with mps - -

All variables including d1n, d2n are mps, and N(.) is the normcdf written by myself.

Either (-n*cx)*(L2/L1)^(n*cx)/L1, or '( N(d1n)-N(d2n) )' can be shown on the matlab. But when I multiply them all, the result is error. Can someone help me with that?

The following is the function N(.)