The term exponential expression is identified in base64 scheme by the sequence ZXhwb25lbnRpYWwgZXhwcmVzc2lvbg==, while the MD5 signature is equal to ab3a233c45692f9b71fbcdf2634f2238. The ASCII encoding of exponential expression in hexadecimal notation is 6578706f6e656e7469616c2065787072657373696f6e.