$5x^2+2x-3=0$
$\cos\left(u\right)\left(1-\cos^2\left(u\right)\right)$
$x^2-4x-11=0$
$2\left(-3-2m\right)\left(-5+8n\right);\:m=2;\:n=4$
$\int\frac{\sqrt{9-x^2}}{10x^2}dx$
$\frac{1\cdot\sin\left(x\right)}{\sec\left(x\right)\cdot\cos\left(x\right)}$
$\int ye^{-2y}dy$
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