$x^4-2^3+8x-15$
$sin\:\frac{x}{2}cos\:\frac{x}{2}=\:\frac{sinx}{2}\:$
$x^2+3x-18\le0$
$3x-18\:<75$
$\left(x-0.4\right)^3$
$\left[\left(p+4\right)\left(p-4\right)\left(p^2+\left(4^2\right)\right)\right]^3$
$2\left(2x-8\right)-8x\le4$
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