$121+198+81^{12}$
$7.8v-2.6+5.3v+4.5+2.4w-6.7$
$\int\frac{x+1}{\sqrt[3]{x^{2}+2x+7}}dx$
$\left(xy-x\right)dx=\left(x^2y^2+2x^2-y^2-2\right)dy$
$\frac{3x^2}{4-x}$
$3x+5=-x-7$
$\left(4x-16\right)^2=0$
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