$464 \times 4 + 176 x ^ { 2 } + 121$
$\frac{dp}{dt}=-\frac{1}{2}tp$
$\frac{dy}{dx}=2-3y$
$x^2+x-72>0$
$y-11y$
$\frac{secx}{cscx}\:+\:tanx=2tanx$
$-15x^2+20$
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