$\left(\frac{3}{4}x\:-\:\frac{2}{5}y\right)\left(\frac{3}{4}x\:\frac{2}{5}y\right)$
$sec^2a+sec^2a\:tan^2a$
$t\left(t\right)=3-\frac{1}{2}\sin\left(2t-\pi\right)$
$7a^2-11a+4$
$y^'-3=2x$
$\left(+4\right)+\left(-60\right)-\left(-9\right)+\left(-4\right)$
$b^2-2b-35=0$
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