$0.8a^2+9a-1.3a^2-4a$
$2\sqrt{11}\cdot\frac{\sqrt{3}}{2}$
$( 1 - 2 n ) ^ { 3 }$
$\sin\left(x\right)=-\frac{\sqrt{31}}{7}$
$\frac{d}{dy}3x^2+y$
$\log\left(x-3\right)=3$
$x^2-10x-79=7$
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