latex 这个公式怎么输入,

$$P\big(GL\big(G;\big(\begin{array}{c}a_1\\[-0。7em]s_1\end{array}\big),\big(\begin{array}{c}a_2\\[-0。7em]s_2\end{array}\big),\cdots,\big(\begin{array}{c}a_n\\[-0。7em]s_n\end{array}\big)\big),x\big)=$$