Which of the following are correct? {{CMD_31}} {{CMD_32}}{{MATH_33}}{{CMD_34}} {{CMD_35}}{{MATH_36}}{{CMD_37}} {{CMD_38}}{{MATH_39}}, so {{MATH_40}}{{CMD_41}} {{CMD_42}}{{MATH_43}}, so as {{MATH_44}}, {{MATH_45}}{{CMD_46}} {{CMD_47}} {{CMD_48}}