The names in bold are found in the word scramble. After each name, I wrote "figure 1" through "figure 4" to indicate which diagram to check out below. For instance, Abel is in figure 2 representing all of the horizontal letter configurations.
1802 - 1829 Niels Henrik Abel (your teacher made a typo and wrote "Neils" instead of "Niels"). See figure 2
1718 - 1799 Maria Gaetana Agnesi. See figure 2 (purple oval); the letters are in reverse.
1845 - 1918 Georg Cantor. See figure 4 (the letters are in reverse)
1789 - 1857 Augustin-Louis Cauchy. See figure 4 (letters are in reverse)
1821 - 1895 Arthur Cayley. See figure 3.
1596 - 1650 Rene Descartes. See figure 3 (the letters are in reverse)
330? - 275? BC Euclid. See figure 2.
1707 - 1783 Leonhard Euler (your teacher made a typo and wrote "Leonard" instead of "Leonhard"). See figure 4.
1601 - 1665 Pierre de Fermat. See figure 3 (the letters are in reverse).
1811 - 1832 Evariste Galois. See figure 2.
1777 - 1855 Carl Friedrich Gauss. See figure 1.
370? - 415 Hypatia. See figure 3 (blue highlight).
1642 - 1727 Isaac Newton.See figure 3 (letters in reverse).
1623 - 1662 Blaise Pascal. See figure 1.
1854 - 1912 Henri Poincare. See figure 2 (letters in reverse).
1826 - 1866 Bernhard Riemann. See figure 1.
Fifth century BC: Zeno. See figure 3
Some names like "Euclid" don't have last names.
The diagrams are shown below.
When you cross everything out used in figures 1 through 4, you'll be left with what you see in figure 5. The remaining letters not crossed out (when read left to right, top to bottom) spell out: Leopold Kronecker. He was a mathematician born 1823 and died 1891. The remaining letters are marked in green.
A negative times a negative results to a positive number, but when two negative numbers are added to each other, it still results to a negative number.