$\int\frac{u^7-4u^4+8}{u^4}du$
$7.06\cdot0.5$
$121a^4-66a^2bc+9b^2c^2$
$t^2-18t+81$
$26+\frac{1}{2}n=11$
$3-5x^2-6y^3+2x^2-6+2+3y$
$\frac{dy}{dx}=xy+x$
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