$\left(-1\right)^2-2\left(-1\right)\left(2\right)+\left(2\right)^2$
$x^2+3x+36$
$4-5-6+2-2+3-7$
$\int\frac{8x}{\left(x^2-5\right)^7}dx$
$10x^4y^2+15y^2$
$sin2x-1=0$
$\left(e^{2t}\right)^2$
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