Решить M=pi/12rad+45^g-21^circ/2/10^g

$$M = \frac { \frac { \pi } { 12 } rad + 45 ^ { g } - \frac { 21 ^ { \circ } } { 2 } } { 10 ^ { g } }$$

Найдите M

$$M=-\frac{126-12\times 45^{g}-\pi adr}{12\times 10^{g}}$$

Найдите a

$$\left\{\begin{matrix}a=-\frac{6\left(-2M\times 10^{g}+2\times 45^{g}-21\right)}{\pi dr}\text{, }&r\neq 0\text{ and }d\neq 0\\a\in \mathrm{R}\text{, }&M=\frac{2\times 45^{g}-21}{2\times 10^{g}}\text{ and }\left(r=0\text{ or }d=0\right)\end{matrix}\right,$$