$x^2-16\:+\:x^2-25$
$-3\left|t-8\right|+1.5$
$36x=-180$
$\frac{3x-1}{5}+\frac{x+2}{5}$
$\left(5x^2y+7x\right).\left(5x^2\right)$
$\frac{\left(x-1\right)}{\left(3x^3-4x^2-x+2\right)}$
$sin2x+3sinx$
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