$16a^2-b^2$
$\int\frac{3x^2+4x+3}{\left(x-2\right)\left(x+3\right)^2}dx$
$solve\:\frac{4}{\sqrt{4}}$
$6b^2x^2-3x^2+4b^2-2$
$4x^2\:+\:\:40x\:+\:49$
$\frac{a^{2a+1}}{a^{a+3}}$
$\frac{10-5sec^2x}{sec^2x}$
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