Question

ayúdenme por favor
$\frac{2}{3} {x}^{2} + \frac{1}{2} {x}^{2} - \frac{5}{4} {x}^{2} =$
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Answer 1

(8x^2 + 6x^2 - 15x^2) / 12 = - 1 / 12 (x^2)