$7\:sin^2\:t\:\left(1\:+\:cot^2\:t\right)$
$a-2\sqrt{ab+b^2}$
$1-\frac{\sin\left(x\right)}{\cos\left(x\right)}=\frac{\cos\left(x\right)-\sin\left(x\right)}{\cos\left(x\right)}$
$15.87+1.00$
$\left|-17\right|$
$6x^2y\left(3xy-4x^2y+3xy^2\right)$
$x^3+4x^2-27x-90$
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