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| <math>\begin{array}{rcccccc} | | <math>\begin{array}{rcccccc} |
| \operatorname{d}(pq) | | \operatorname{d}(pq) |
− | & = & p & \cdot & q & \cdot & | + | & = & |
| + | p & \cdot & q & \cdot & |
| \texttt{(} \operatorname{d}p \texttt{,} \operatorname{d}q \texttt{)} | | \texttt{(} \operatorname{d}p \texttt{,} \operatorname{d}q \texttt{)} |
| \\[4pt] | | \\[4pt] |
− | & + & p & \cdot & \texttt{(} q \texttt{)} & \cdot & \operatorname{d}q | + | & + & |
| + | p & \cdot & \texttt{(} q \texttt{)} & \cdot & \operatorname{d}q |
| \\[4pt] | | \\[4pt] |
− | & + & \texttt{(} p \texttt{)} & \cdot & q & \cdot & \operatorname{d}p | + | & + & |
| + | \texttt{(} p \texttt{)} & \cdot & q & \cdot & \operatorname{d}p |
| \\[4pt] | | \\[4pt] |
− | & + & \texttt{(} p \texttt{)} & \cdot & \texttt{(}q \texttt{)} & \cdot & 0 | + | & + & |
| + | \texttt{(} p \texttt{)} & \cdot & \texttt{(}q \texttt{)} & \cdot & 0 |
| \end{array}</math> | | \end{array}</math> |
| |} | | |} |
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| <math>\begin{array}{rcccccc} | | <math>\begin{array}{rcccccc} |
| \operatorname{r}(pq) | | \operatorname{r}(pq) |
− | & = & p & \cdot & q & \cdot & | + | & = & |
| + | p & \cdot & q & \cdot & |
| \operatorname{d}p ~ \operatorname{d}q | | \operatorname{d}p ~ \operatorname{d}q |
| \\[4pt] | | \\[4pt] |
− | & + & p & \cdot & \texttt{(} q \texttt{)} & \cdot & | + | & + & |
| + | p & \cdot & \texttt{(} q \texttt{)} & \cdot & |
| \operatorname{d}p ~ \operatorname{d}q | | \operatorname{d}p ~ \operatorname{d}q |
| \\[4pt] | | \\[4pt] |
− | & + & \texttt{(} p \texttt{)} & \cdot & q & \cdot & | + | & + & |
| + | \texttt{(} p \texttt{)} & \cdot & q & \cdot & |
| \operatorname{d}p ~ \operatorname{d}q | | \operatorname{d}p ~ \operatorname{d}q |
| \\[4pt] | | \\[4pt] |
− | & + & \texttt{(} p \texttt{)} & \cdot & \texttt{(}q \texttt{)} & \cdot & | + | & + & |
| + | \texttt{(} p \texttt{)} & \cdot & \texttt{(}q \texttt{)} & \cdot & |
| \operatorname{d}p ~ \operatorname{d}q | | \operatorname{d}p ~ \operatorname{d}q |
| \end{array}</math> | | \end{array}</math> |
| |} | | |} |