1. The user requests help with topics in number and algebra including standard form, arithmetic and geometric sequences, financial applications of GP and AP, exponents and logarithms, approximation and errors, and annuities. 2. These topics cover a broad range of algebraic concepts used in IBDP Math SL. 3. For example, arithmetic sequences use the formula $a_n = a_1 + (n-1)d$ where $a_n$ is the nth term, $a_1$ is the first term, and $d$ is the common difference. 4. Geometric sequences use $a_n = a_1 r^{n-1}$ where $r$ is the common ratio. 5. Financial applications often involve sums of sequences, such as the sum of a geometric series $S_n = a_1 \frac{1-r^n}{1-r}$ for $r \neq 1$. 6. Exponents and logarithms follow the rules $a^m \times a^n = a^{m+n}$ and $\log_b(xy) = \log_b x + \log_b y$. 7. Approximation and errors involve understanding absolute and relative error, e.g., absolute error = $|\text{measured} - \text{true}|$. 8. Annuities involve calculating payments or values over time using formulas derived from geometric series. 9. Each topic requires practice with formulas and understanding their derivations and applications. 10. Please specify a particular problem or topic for detailed step-by-step help.