400 ™ trademark

401 Ω uni2126

402 ℮ estimated

403 ∂ partialdiff

404 ∆ uni2206

405 ∏ product

406 ∑ summation

407 − minus

408 ∕ uni2215

409 ∗ asteriskmath

410 ∘ uni2218

411 ∙ uni2219

412 √ radical

413 ∛ uni221B

414 ∞ infinity

415 ≈ approxequal

416 ≠ notequal

417 ≡ equivalence

418 ≤ lessequal

419 ≥ greaterequal

420 ◊ lozenge