Regex to use to extract notion.so urls:
[(]https?:\/\/(www\.)?[notion\.so]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)
1 | Linear: Univariate. 1. Hypothesis. Cost. Gradient Descent.
1 | Linear: 2. Univariate. Convergence. Learning Rate. Visual Intuitions
2 | Linear: Multivariate. 1. Hypothesis. Cost. Gradient Descent.
2 | Linear: Multivariate: 2. Feature Scaling and Normal
3 | Logistic: 1. Hypothesis, Cost, Gradient
3 | Regularisation: Cost and Gradient