$x\left(\frac{dx}{dy}\right)-1=0$
$\frac{2-cos^2x}{sinx}$
$5\left(4v-2\right)+3\left(4v-3\right)$
$\lim_{x\to-1}\frac{\cos\left(x\right)}{x+1}$
$2x^2+4x+49$
$\sqrt[5]{-243m^5n^{15}}$
$\left(-4\right)-\left(3\right)\left(5x+8\right)$
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