$4x\:+\:20$
$1+2b-14b$
$25+\frac{1}{5}a=14$
$1-\left(-3+6+1\right)-\left[4-\left(3+1\right)\right]-2$
$\lim_{x\to0}\frac{\left(1+x^3\right)^4-1}{x}$
$169-1.96$
$2h^2+h^2$
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