$\int x\left(\frac{2}{\cos^2\left(x\right)}-\frac{3}{\sin^2\left(x\right)}\right)dx$
$y^2-84=5y$
$64s^3-27k^3$
$24\cdot118$
$\int\frac{x}{x^2-6x+9}dx$
$23x+2\leq2$
$3x\ge13$
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