12a − 5a 3 + 8ab − 19a + 11a 3 − 15ab12a\:-\:5a\:3\:+\:8ab\:-\:19a\:+\:11a\:3\:-\:15ab12a−5a3+8ab−19a+11a3−15ab
x2−7x+2x−2\frac{x^2-7x+2}{x-2}x−2x2−7x+2
4−x2≤−24-x^2\le-24−x2≤−2
x2−155x+2800x^2-155x+2800x2−155x+2800
112x4−896x2112x^4-896x^2112x4−896x2
6∣x+1∣+2∣x−4∣6\left|x+1\right|+2\left|x-4\right|6∣x+1∣+2∣x−4∣
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