21+11\frac{2}{1}+\frac{1}{1}12+11
(−31)(−4)\left(-31\right)\left(-4\right)(−31)(−4)
(−5)(−24)\left(-5\right)\left(-24\right)(−5)(−24)
81a54b3\sqrt[4]{81a^5}b^3481a5b3
6y′′+4y′+5y=06y''+4y'+5y=06y′′+4y′+5y=0
4x2−12y 4x^2-12y\:4x2−12y
2−642-642−64
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