7.4 -（2 - 1.05）×0.4/D,t2s8K+z2C9H(]1R.q
算式：提示+q/D6D'Y2f)m/D,t2s8K+z2C9H(]1R.q
=:z3V5I5T/D,t2s8K+z2C9H(]1R.q