$\left(x^2+2\right)\sqrt[2]{5+3x}$
$9y^2+18y+9$
$\int\frac{x+3}{\left(x+1\right)\left(x^2+x+3\right)}dx$
$\int x^2\cos\left(\frac{1}{4}x\right)dx$
$sin\left(-x\right)sec\left(-x\right)cos\left(-x\right)$
$-3+3\left(-6-3+1\right)$
$\left(l\cdot sin\left(q\right)+t\cdot sin\left(q+k\right)\right)^2+\left(l\cdot\:cos\left(q\right)+t\cdot\:cos\left(q+k\right)\right)^2$
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