$\left(7y\right)\left(-7y\right)$
$.25x^2-25y^2$
$arcsec\left(sec\left(2x\right)\right)=2.3664$
$\int20t\cdot\sin\left(wt\right)dt$
$\frac{2\left(1\right)^3+4\left(1\right)^2+6\left(1\right)-2}{\left(1\right)-1}$
$-1250+-1100$
$\left(-7\right)-\left(-26\right)$
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