这个式子英文怎么读?7^2×(9+A)^3=(b-2/3)^-2中文：七的平方乘以括号九加大A括号的三次方等于括号小b减

seven square times the cubic of nine plus *Capital A equals to the negative second power of **small b minus two third。two third - 三分之二negative second power = 负二次方 -上文中,"negative second power of **small b minus two third"就有negative second power of (small b minus two third)的意思了*Capital A = 大写A**small b = 小写 b9^3+A的话是叫nine cubic plus A (Capital A)（b^-2）-2/3的话就是b (small b) to the negative second power minus two third***b to the negative second power 就是(b^-2)的意思了