$\lim_{x\to-1}\frac{x-1}{x^2-3x-4}$
$-4x^2-4x+24$
$\left(6x-5\right)\left(2x+3\right)\sqrt[3]{6}$
$\int-5x^2dx$
$tangente$
$\left(csc\:45-tan\:30\right)cot\:30\:sen\:45+sen\:30$
$6y^2-3y$
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