5c^2 +30c + 45
4xy^2*2xy
4a-11>13
solve the equality
6x + 3y = 30
5x-y=4
2*(x + 1) = 4251
solve by taking square roots -2\left(x+1\right)^{2}+16=0
2x^2 - 16x + 32
4/6 + 5/3 + 8/9
$\frac{4}{19}\div 94.05$
(-2x+6)+(4x-4)