$\frac{3xy}{xy}$
$9-\left(2-4\right)$
$y^2+11y+30$
$5\cos\left(x\right)^2+13\sin\left(x\right)^2=11$
$\frac{\cos\left(d\right)\sec\left(d\right)}{\tan\left(d\right)}=\cot\left(d\right)$
$3^5x\:3^7$
$x^3+x^2+2x$
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