$\frac{3x-5}{4}-\frac{x-9}{5}<\frac{x+3}{3}-6$
$x^8\left(x+3\right)^2\left(x^2+2x+4\right)=0$
$3.2+5.7$
$\int x\arccot\left(5x\right)dx$
$3cos^2\left(x\right)+7cos\left(x\right)-6=6$
$\frac{1}{4}\sec\left(6x\right)\csc\left(6x\right)$
$\left(7x\sqrt{x}+\frac{4}{x^2\sqrt{x}}\right)$
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