Let v be 2 + -2 + 7 - -4. Solve 4*r + 5 + v = 0 for r.

Suppose -3*k + 5*f = -84, 8*k - 5*f - 112 = 4*k. Suppose -2*x - c = -k, 18 - 1 = x + 2*c. Solve 0 = 3*w - 2 - x for w.

5

Let o = -7 - -8. Let m(v) be the second derivative of -v⁵⁄₂₀ - v⁴⁄₁₂ + v**³⁄₆ - v. Let r be m(-2). Solve 7 = r*u + o for u.

3

Suppose 5 = 4*q + q. Let o = 3 - q. Suppose -w + w - w = 0. Solve r - o - 1 = w for r.

3

Let u(b) = b - 1. Let q be u(4). Solve -q*s + 2 - 17 = 0 for s.

-5

Suppose 4*w = -4*i + 16, i = -i - 3*w + 3. Solve i = 4*x - x for x.

3

Suppose -3*x + 8 = 32. Let p = -7 - x. Solve -8 - p = 3*z for z.

-3

Suppose 5*s = 28 + 62. Suppose -s = -5*t + 2*t. Solve 4*d + 2 = -t for d.

-2

Suppose 7*v + 48 = 13*v. Solve 2*i + 0*i = -v for i.

-4

Let c(h) = -3*h + 5. Let v be c(-7). Suppose -3 = 3*f, -5 - v = -5*o + f. Let b be o/(-4)*28/(-21). Solve 0 = -s - 3 + b for s.

-1

Let j = -8 + 4. Let y = j + 7. Suppose 2*s = -2*s - 3*n - 3, 5*s + 3*n = -3. Solve -y*a + s = -12 for a.

4