$x^2-13x+45$
$2\tan\left(a\right)+\cos\left(a\right)=\frac{\cos^2a+2\sin\left(a\right)}{\cos\left(a\right)}$
$\int_1^2\left(e^{\sqrt{x}}\right)dx$
$\left(x-5\right)\cdot4$
$4x+8y+3x$
$36x^2+24x+4$
$\frac{2x^3-7x^2+8x-3}{2x-3}$
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