$93.649\:+31.74$
$8x-9=15$
$x^2+3x+81$
$2\cos\left(2x\right)=2\sin\left(2x\right)$
$\sqrt{cosx}=cosx$
$a\left(x\right)=x^2+3x-10$
$1x^2-kx+121$
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