$3x-y=-11$

$5x-8x+x-6x+21x$

$0-\left(-1-1\right)$

$3\left(c-4d^2\right)-3\left(4c-d^2\right)$

$\lim_{x\to\frac{\pi}{4}}\left(\frac{\tan\left(x\right)}{1}\right)^{\tan\left(2x\right)}$

$\int\left(4x^3+5x\right)\left(sin\left(3x\right)\right)dx$

$\int\left(a-x\right)\cdot\cos\left(xw\right)dx$