simplify some expressions
simplify some expressions

escherba/lsh-hdc,escherba/lsh-hdc,escherba/lsh-hdc,pombredanne/lsh-hdc,pombredanne/lsh-hdc,pombredanne/lsh-hdc,escherba/lsh-hdc,pombredanne/lsh-hdc,pombredanne/lsh-hdc,escherba/lsh-hdc