$234\cdot215$
$3xy^2+5y-y^3=0$
$\int_0^4\left(\frac{16}{\sqrt{x^2+16}}\right)^2dx$
$14x\:+\:9=22x+1$
$9x^2+54x$
$\lim_{x\to0}\left(\frac{x^3+4x^2}{x^2-2x^2}\right)$
$sin2x-1=0$
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