$\cos22.5^{\circ}$
$x^3-4x^2-3x+18$
$412-28b$
$\left(x-1\right)ln\left(2x+1\right)$
$\int\frac{3x-1}{\left(x^2+4\right)\left(x-4\right)}dx$
$8q^4t+2q^3t^2-6q^2+4$
$4+5-3+5+6+2+3$
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