$\lim_{x\to0}\left(\frac{1}{x}-\frac{1}{x^2.secx}\right)$
$\left(2a+3ab^2\right)^3$
$\frac{\sec\left(x\right)-\tan\left(x\right)}{\csc\left(x\right)-1}$
$x^8-m^8$
$\left(b-14\right)\left(b+4\right)$
$\left(\frac{1}{6}x^5\right)\cdot\left(-3x^2\right)\cdot\left(4x^7\right)$
$\left(3x^2y+10x^3y^3\right)^3$
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