1. The landlord has 1 apple, a7803929 13 has 3 apples, and a * * * has several apples?
2. Lu Xun cleaned the toilet seven times, and Teacher Xi cleaned the toilet 1 time. How many times did he clean it?
Find ArcSinh4ln (0.25 π-0.634 )×1.142013 log (1.1kloc-0/4470007).
Second, the calculation questions (each question is 0.0 1 minute)
1.3-2=?