16x2−77x+1007x2−x\frac{16x^2-77x+100}{7x^2-x}7x2−x16x2−77x+100
sec(x)22\frac{\sec\left(x\right)^2}{2}2sec(x)2
(a2b3)−4\left(a^2b^3\right)^{-4}(a2b3)−4
30a2+17a−2130a^2+17a-2130a2+17a−21
limx→2(x+2x2−4)\lim_{x\to2}\left(\frac{\sqrt{x+2}}{\sqrt{x^2-4}}\right)x→2lim(x2−4x+2)
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