Which of the following are rational functions? {{CMD_28}} {{CMD_29}}{{MATH_30}}{{CMD_31}} {{CMD_32}}{{MATH_33}}{{CMD_34}} {{CMD_35}}{{MATH_36}}{{CMD_37}} {{CMD_38}}{{MATH_39}}{{CMD_40}} {{CMD_41}}{{MATH_42}}{{CMD_43}} {{CMD_44}}{{MATH_45}}{{CMD_46}} {{CMD_47}}{{MATH_48}}{{CMD_49}} {{CMD_50}} {{CMD_51}} All polynomials can be thought of as rational functions. {{CMD_52}} {{CMD_53}}