$1-sin^2-sin^2x\infty$
$\int_{-9}^0-xe^{-x^2}dx$
$\frac{\left(-15\right)\left(-6\right)\left(+4\right)}{\left(-15\right)\left(-12\right)}$
$y''+y'+2y=0$
$\lim_{x\to1}\left(x^2\right)+\left(\frac{1}{x+1}\right)$
$1-\cos\left(x\right)^2+\cos\left(x\right)^4$
$3+3i^6$
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