How do you find the -LSB- math -RSB- \ frac -LCB- dy -RCB- -LCB- dx -RCB- -LSB- / math -RSB- of -LSB- math -RSB- \ tan \ left -LRB- \ frac -LCB- x -RCB- -LCB- y -RCB- \ right -RRB- = x + y -LSB- / math -RSB- ?
What is the derivative of -LSB- math -RSB- x ^ x -LSB- / math -RSB- ?