L2, L3, L5, L6, L7, L8, L10, L13, L17 | Operations |

L2, L3, L4, L5, L6, L7, L9 | Coefficients |

L4, L9, L16 | Complete and incomplete equations |

L9, L14, L15, L16 | X |

L4, L9, L10, L13, L14, L16 | Terms |

L2 | Literal part and numeric part |

L2, L4, L5, L7, L9, L15 | Equation and inequality |

L4, L11, L12, L17 | Problem |

L4, L5, L6 | Exponent |

L1 | Modular, irrational, logarithmic, exponential and parabola |

L7, L8 | Algebra |

L1, L3, L17 | System |

L4, L10 | Numerical Sets |

L2 | Algebraic operations |

L7, L11 | Polynomials |

L15, L7 | Balance |

L2, L7 | Equality and equivalence |