$cos\left(2x-90\right)=0$
$\sin^2\left(x\right)=1-\cos^2\left(x\right)$
$n-37=-42$
$2x^2-14x+20$
$\int_0^7\left(-2x\right)dx$
$3x^2+3x+6$
$225n^{4}-40$
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