$3x+5\ge6x+7$
$t^2\frac{dy}{dt}-t=1+y+ty,\:y\left(1\right)=6$
$2x+5=x^2$
$\left(16+11j\right)\left(16-11j\right)$
$-5+3.x<-2.\left(4-x\right)$
$36^2-60rt+25t^2$
$\frac{7^2-81}{12^2-5\left(12\right)-84}$
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