(Solved): Format: - The leter e will be recognised as Euler's number. - Use" to explicity indicate muliplicat ...

Format: - The leter e will be recognised as Euler's number. - Use" to explicity indicate muliplication botween variables and other variablos, between variables and brackets, or between sete of brackets \( \left(e .9 x^{\circ} y\right. \) rather than \( x y, 2^{2}(x+y) \) rather than \( \left.2(x+y)\right) \). - Put arguments of functions in brackots \( (e .9 . \sin (x) \) rather than \( \sin x) \). For \( u=x^{7} \cdot y^{8} \cdot z^{7} \), calculate \( \frac{\partial^{6} u}{\partial z \partial y^{2} \partial z^{3}} \). \[ \frac{\partial^{6} u}{\partial z \partial y^{2} \partial z^{3}}= \]