$5.398-0.92$
$\int\frac{\left(sec^2\sqrt{x}\right)}{\sqrt{x}}dx$
$4x^2+2x-8=4x^2-5x+6$
$\frac{tan\:x\:\left(cos^2x-sin^2x\right)}{1+tan^2x}$
$x^2-50x+25=0$
$x^2-5x<-54$
$2+10m-7n+3n\\:-11m$
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