$a^2-3ab+2b^2;a=4,b=12,c=18,m=\frac{1}{4},n=\frac{1}{6};$
$m^6m^6-21-54$
$\int x^4\left(x^5-125\right)^7dx$
$4y^2-12y+2$
$\int\frac{\left(x+7\right)}{\sqrt{16+x^2}}dx$
$2x\frac{dy}{dx}\:-lnx^2\:=0;\:y\left(1\right)=2$
$\left(a^2+c^2\right)^2$
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