$\left(2ab+3a^2b\right)+\left(-11ab-3a^2b\right)$
$x=c_{1}\cos\left(y-c_{2}\right)$
$5.9-1.50$
$12\left(0\right)^2e^{-0^2}-6\left(0\right)^{-0^2}$
$2x^2-5x+5\ge0$
$\int_0^0\frac{\cos\:\left(2x\right)}{2}dx$
$-\frac{189}{-21}$
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