$+15+1\left(-40\right)-2$
$12^0\:x\:3^{-4}$
$-2x^2-6x+13$
$\frac{\left(1-cos^{\left(2\right)}x\right)}{\left(cscx\right)}$
$\left(-95\right)-\left(-43\right)$
$\int_{-9}^9x\left(\sqrt{81-x^2}\right)dx$
$( 2 x - y ) ^ { 4 }$
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